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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2015 MediaTek Inc.
4 */
5
6#include <linux/clk.h>
7#include <linux/pm_runtime.h>
8
9#include <asm/barrier.h>
10#include <soc/mediatek/smi.h>
11
12#include <drm/drm_atomic_helper.h>
13#include <drm/drm_plane_helper.h>
14#include <drm/drm_probe_helper.h>
15#include <drm/drm_vblank.h>
16
17#include "mtk_drm_drv.h"
18#include "mtk_drm_crtc.h"
19#include "mtk_drm_ddp.h"
20#include "mtk_drm_ddp_comp.h"
21#include "mtk_drm_gem.h"
22#include "mtk_drm_plane.h"
23
24/**
25 * struct mtk_drm_crtc - MediaTek specific crtc structure.
26 * @base: crtc object.
27 * @enabled: records whether crtc_enable succeeded
28 * @planes: array of 4 drm_plane structures, one for each overlay plane
29 * @pending_planes: whether any plane has pending changes to be applied
30 * @config_regs: memory mapped mmsys configuration register space
31 * @mutex: handle to one of the ten disp_mutex streams
32 * @ddp_comp_nr: number of components in ddp_comp
33 * @ddp_comp: array of pointers the mtk_ddp_comp structures used by this crtc
34 */
35struct mtk_drm_crtc {
36 struct drm_crtc base;
37 bool enabled;
38
39 bool pending_needs_vblank;
40 struct drm_pending_vblank_event *event;
41
42 struct drm_plane *planes;
43 unsigned int layer_nr;
44 bool pending_planes;
45
46 void __iomem *config_regs;
47 struct mtk_disp_mutex *mutex;
48 unsigned int ddp_comp_nr;
49 struct mtk_ddp_comp **ddp_comp;
50};
51
52struct mtk_crtc_state {
53 struct drm_crtc_state base;
54
55 bool pending_config;
56 unsigned int pending_width;
57 unsigned int pending_height;
58 unsigned int pending_vrefresh;
59};
60
61static inline struct mtk_drm_crtc *to_mtk_crtc(struct drm_crtc *c)
62{
63 return container_of(c, struct mtk_drm_crtc, base);
64}
65
66static inline struct mtk_crtc_state *to_mtk_crtc_state(struct drm_crtc_state *s)
67{
68 return container_of(s, struct mtk_crtc_state, base);
69}
70
71static void mtk_drm_crtc_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
72{
73 struct drm_crtc *crtc = &mtk_crtc->base;
74 unsigned long flags;
75
76 spin_lock_irqsave(&crtc->dev->event_lock, flags);
77 drm_crtc_send_vblank_event(crtc, mtk_crtc->event);
78 drm_crtc_vblank_put(crtc);
79 mtk_crtc->event = NULL;
80 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
81}
82
83static void mtk_drm_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
84{
85 drm_crtc_handle_vblank(&mtk_crtc->base);
86 if (mtk_crtc->pending_needs_vblank) {
87 mtk_drm_crtc_finish_page_flip(mtk_crtc);
88 mtk_crtc->pending_needs_vblank = false;
89 }
90}
91
92static void mtk_drm_crtc_destroy(struct drm_crtc *crtc)
93{
94 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
95
96 mtk_disp_mutex_put(mtk_crtc->mutex);
97
98 drm_crtc_cleanup(crtc);
99}
100
101static void mtk_drm_crtc_reset(struct drm_crtc *crtc)
102{
103 struct mtk_crtc_state *state;
104
105 if (crtc->state) {
106 __drm_atomic_helper_crtc_destroy_state(crtc->state);
107
108 state = to_mtk_crtc_state(crtc->state);
109 memset(state, 0, sizeof(*state));
110 } else {
111 state = kzalloc(sizeof(*state), GFP_KERNEL);
112 if (!state)
113 return;
114 crtc->state = &state->base;
115 }
116
117 state->base.crtc = crtc;
118}
119
120static struct drm_crtc_state *mtk_drm_crtc_duplicate_state(struct drm_crtc *crtc)
121{
122 struct mtk_crtc_state *state;
123
124 state = kzalloc(sizeof(*state), GFP_KERNEL);
125 if (!state)
126 return NULL;
127
128 __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
129
130 WARN_ON(state->base.crtc != crtc);
131 state->base.crtc = crtc;
132
133 return &state->base;
134}
135
136static void mtk_drm_crtc_destroy_state(struct drm_crtc *crtc,
137 struct drm_crtc_state *state)
138{
139 __drm_atomic_helper_crtc_destroy_state(state);
140 kfree(to_mtk_crtc_state(state));
141}
142
143static bool mtk_drm_crtc_mode_fixup(struct drm_crtc *crtc,
144 const struct drm_display_mode *mode,
145 struct drm_display_mode *adjusted_mode)
146{
147 /* Nothing to do here, but this callback is mandatory. */
148 return true;
149}
150
151static void mtk_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
152{
153 struct mtk_crtc_state *state = to_mtk_crtc_state(crtc->state);
154
155 state->pending_width = crtc->mode.hdisplay;
156 state->pending_height = crtc->mode.vdisplay;
157 state->pending_vrefresh = crtc->mode.vrefresh;
158 wmb(); /* Make sure the above parameters are set before update */
159 state->pending_config = true;
160}
161
162static int mtk_drm_crtc_enable_vblank(struct drm_crtc *crtc)
163{
164 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
165 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
166
167 mtk_ddp_comp_enable_vblank(comp, &mtk_crtc->base);
168
169 return 0;
170}
171
172static void mtk_drm_crtc_disable_vblank(struct drm_crtc *crtc)
173{
174 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
175 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
176
177 mtk_ddp_comp_disable_vblank(comp);
178}
179
180static int mtk_crtc_ddp_clk_enable(struct mtk_drm_crtc *mtk_crtc)
181{
182 int ret;
183 int i;
184
185 DRM_DEBUG_DRIVER("%s\n", __func__);
186 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
187 ret = clk_prepare_enable(mtk_crtc->ddp_comp[i]->clk);
188 if (ret) {
189 DRM_ERROR("Failed to enable clock %d: %d\n", i, ret);
190 goto err;
191 }
192 }
193
194 return 0;
195err:
196 while (--i >= 0)
197 clk_disable_unprepare(mtk_crtc->ddp_comp[i]->clk);
198 return ret;
199}
200
201static void mtk_crtc_ddp_clk_disable(struct mtk_drm_crtc *mtk_crtc)
202{
203 int i;
204
205 DRM_DEBUG_DRIVER("%s\n", __func__);
206 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
207 clk_disable_unprepare(mtk_crtc->ddp_comp[i]->clk);
208}
209
210static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
211{
212 struct drm_crtc *crtc = &mtk_crtc->base;
213 struct drm_connector *connector;
214 struct drm_encoder *encoder;
215 struct drm_connector_list_iter conn_iter;
216 unsigned int width, height, vrefresh, bpc = MTK_MAX_BPC;
217 int ret;
218 int i;
219
220 DRM_DEBUG_DRIVER("%s\n", __func__);
221 if (WARN_ON(!crtc->state))
222 return -EINVAL;
223
224 width = crtc->state->adjusted_mode.hdisplay;
225 height = crtc->state->adjusted_mode.vdisplay;
226 vrefresh = crtc->state->adjusted_mode.vrefresh;
227
228 drm_for_each_encoder(encoder, crtc->dev) {
229 if (encoder->crtc != crtc)
230 continue;
231
232 drm_connector_list_iter_begin(crtc->dev, &conn_iter);
233 drm_for_each_connector_iter(connector, &conn_iter) {
234 if (connector->encoder != encoder)
235 continue;
236 if (connector->display_info.bpc != 0 &&
237 bpc > connector->display_info.bpc)
238 bpc = connector->display_info.bpc;
239 }
240 drm_connector_list_iter_end(&conn_iter);
241 }
242
243 ret = pm_runtime_get_sync(crtc->dev->dev);
244 if (ret < 0) {
245 DRM_ERROR("Failed to enable power domain: %d\n", ret);
246 return ret;
247 }
248
249 ret = mtk_disp_mutex_prepare(mtk_crtc->mutex);
250 if (ret < 0) {
251 DRM_ERROR("Failed to enable mutex clock: %d\n", ret);
252 goto err_pm_runtime_put;
253 }
254
255 ret = mtk_crtc_ddp_clk_enable(mtk_crtc);
256 if (ret < 0) {
257 DRM_ERROR("Failed to enable component clocks: %d\n", ret);
258 goto err_mutex_unprepare;
259 }
260
261 DRM_DEBUG_DRIVER("mediatek_ddp_ddp_path_setup\n");
262 for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
263 mtk_ddp_add_comp_to_path(mtk_crtc->config_regs,
264 mtk_crtc->ddp_comp[i]->id,
265 mtk_crtc->ddp_comp[i + 1]->id);
266 mtk_disp_mutex_add_comp(mtk_crtc->mutex,
267 mtk_crtc->ddp_comp[i]->id);
268 }
269 mtk_disp_mutex_add_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
270 mtk_disp_mutex_enable(mtk_crtc->mutex);
271
272 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
273 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[i];
274
275 mtk_ddp_comp_config(comp, width, height, vrefresh, bpc);
276 mtk_ddp_comp_start(comp);
277 }
278
279 /* Initially configure all planes */
280 for (i = 0; i < mtk_crtc->layer_nr; i++) {
281 struct drm_plane *plane = &mtk_crtc->planes[i];
282 struct mtk_plane_state *plane_state;
283
284 plane_state = to_mtk_plane_state(plane->state);
285 mtk_ddp_comp_layer_config(mtk_crtc->ddp_comp[0], i,
286 plane_state);
287 }
288
289 return 0;
290
291err_mutex_unprepare:
292 mtk_disp_mutex_unprepare(mtk_crtc->mutex);
293err_pm_runtime_put:
294 pm_runtime_put(crtc->dev->dev);
295 return ret;
296}
297
298static void mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc *mtk_crtc)
299{
300 struct drm_device *drm = mtk_crtc->base.dev;
301 int i;
302
303 DRM_DEBUG_DRIVER("%s\n", __func__);
304 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
305 mtk_ddp_comp_stop(mtk_crtc->ddp_comp[i]);
306 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
307 mtk_disp_mutex_remove_comp(mtk_crtc->mutex,
308 mtk_crtc->ddp_comp[i]->id);
309 mtk_disp_mutex_disable(mtk_crtc->mutex);
310 for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
311 mtk_ddp_remove_comp_from_path(mtk_crtc->config_regs,
312 mtk_crtc->ddp_comp[i]->id,
313 mtk_crtc->ddp_comp[i + 1]->id);
314 mtk_disp_mutex_remove_comp(mtk_crtc->mutex,
315 mtk_crtc->ddp_comp[i]->id);
316 }
317 mtk_disp_mutex_remove_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
318 mtk_crtc_ddp_clk_disable(mtk_crtc);
319 mtk_disp_mutex_unprepare(mtk_crtc->mutex);
320
321 pm_runtime_put(drm->dev);
322}
323
324static void mtk_crtc_ddp_config(struct drm_crtc *crtc)
325{
326 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
327 struct mtk_crtc_state *state = to_mtk_crtc_state(mtk_crtc->base.state);
328 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
329 unsigned int i;
330
331 /*
332 * TODO: instead of updating the registers here, we should prepare
333 * working registers in atomic_commit and let the hardware command
334 * queue update module registers on vblank.
335 */
336 if (state->pending_config) {
337 mtk_ddp_comp_config(comp, state->pending_width,
338 state->pending_height,
339 state->pending_vrefresh, 0);
340
341 state->pending_config = false;
342 }
343
344 if (mtk_crtc->pending_planes) {
345 for (i = 0; i < mtk_crtc->layer_nr; i++) {
346 struct drm_plane *plane = &mtk_crtc->planes[i];
347 struct mtk_plane_state *plane_state;
348
349 plane_state = to_mtk_plane_state(plane->state);
350
351 if (plane_state->pending.config) {
352 mtk_ddp_comp_layer_config(comp, i, plane_state);
353 plane_state->pending.config = false;
354 }
355 }
356 mtk_crtc->pending_planes = false;
357 }
358}
359
360static void mtk_drm_crtc_atomic_enable(struct drm_crtc *crtc,
361 struct drm_crtc_state *old_state)
362{
363 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
364 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
365 int ret;
366
367 DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
368
369 ret = mtk_smi_larb_get(comp->larb_dev);
370 if (ret) {
371 DRM_ERROR("Failed to get larb: %d\n", ret);
372 return;
373 }
374
375 ret = mtk_crtc_ddp_hw_init(mtk_crtc);
376 if (ret) {
377 mtk_smi_larb_put(comp->larb_dev);
378 return;
379 }
380
381 drm_crtc_vblank_on(crtc);
382 mtk_crtc->enabled = true;
383}
384
385static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc,
386 struct drm_crtc_state *old_state)
387{
388 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
389 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
390 int i;
391
392 DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
393 if (!mtk_crtc->enabled)
394 return;
395
396 /* Set all pending plane state to disabled */
397 for (i = 0; i < mtk_crtc->layer_nr; i++) {
398 struct drm_plane *plane = &mtk_crtc->planes[i];
399 struct mtk_plane_state *plane_state;
400
401 plane_state = to_mtk_plane_state(plane->state);
402 plane_state->pending.enable = false;
403 plane_state->pending.config = true;
404 }
405 mtk_crtc->pending_planes = true;
406
407 /* Wait for planes to be disabled */
408 drm_crtc_wait_one_vblank(crtc);
409
410 drm_crtc_vblank_off(crtc);
411 mtk_crtc_ddp_hw_fini(mtk_crtc);
412 mtk_smi_larb_put(comp->larb_dev);
413
414 mtk_crtc->enabled = false;
415}
416
417static void mtk_drm_crtc_atomic_begin(struct drm_crtc *crtc,
418 struct drm_crtc_state *old_crtc_state)
419{
420 struct mtk_crtc_state *state = to_mtk_crtc_state(crtc->state);
421 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
422
423 if (mtk_crtc->event && state->base.event)
424 DRM_ERROR("new event while there is still a pending event\n");
425
426 if (state->base.event) {
427 state->base.event->pipe = drm_crtc_index(crtc);
428 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
429 mtk_crtc->event = state->base.event;
430 state->base.event = NULL;
431 }
432}
433
434static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
435 struct drm_crtc_state *old_crtc_state)
436{
437 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
438 struct mtk_drm_private *priv = crtc->dev->dev_private;
439 unsigned int pending_planes = 0;
440 int i;
441
442 if (mtk_crtc->event)
443 mtk_crtc->pending_needs_vblank = true;
444 for (i = 0; i < mtk_crtc->layer_nr; i++) {
445 struct drm_plane *plane = &mtk_crtc->planes[i];
446 struct mtk_plane_state *plane_state;
447
448 plane_state = to_mtk_plane_state(plane->state);
449 if (plane_state->pending.dirty) {
450 plane_state->pending.config = true;
451 plane_state->pending.dirty = false;
452 pending_planes |= BIT(i);
453 }
454 }
455 if (pending_planes)
456 mtk_crtc->pending_planes = true;
457 if (crtc->state->color_mgmt_changed)
458 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
459 mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i], crtc->state);
460
461 if (priv->data->shadow_register) {
462 mtk_disp_mutex_acquire(mtk_crtc->mutex);
463 mtk_crtc_ddp_config(crtc);
464 mtk_disp_mutex_release(mtk_crtc->mutex);
465 }
466}
467
468static const struct drm_crtc_funcs mtk_crtc_funcs = {
469 .set_config = drm_atomic_helper_set_config,
470 .page_flip = drm_atomic_helper_page_flip,
471 .destroy = mtk_drm_crtc_destroy,
472 .reset = mtk_drm_crtc_reset,
473 .atomic_duplicate_state = mtk_drm_crtc_duplicate_state,
474 .atomic_destroy_state = mtk_drm_crtc_destroy_state,
475 .gamma_set = drm_atomic_helper_legacy_gamma_set,
476 .enable_vblank = mtk_drm_crtc_enable_vblank,
477 .disable_vblank = mtk_drm_crtc_disable_vblank,
478};
479
480static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
481 .mode_fixup = mtk_drm_crtc_mode_fixup,
482 .mode_set_nofb = mtk_drm_crtc_mode_set_nofb,
483 .atomic_begin = mtk_drm_crtc_atomic_begin,
484 .atomic_flush = mtk_drm_crtc_atomic_flush,
485 .atomic_enable = mtk_drm_crtc_atomic_enable,
486 .atomic_disable = mtk_drm_crtc_atomic_disable,
487};
488
489static int mtk_drm_crtc_init(struct drm_device *drm,
490 struct mtk_drm_crtc *mtk_crtc,
491 struct drm_plane *primary,
492 struct drm_plane *cursor, unsigned int pipe)
493{
494 int ret;
495
496 ret = drm_crtc_init_with_planes(drm, &mtk_crtc->base, primary, cursor,
497 &mtk_crtc_funcs, NULL);
498 if (ret)
499 goto err_cleanup_crtc;
500
501 drm_crtc_helper_add(&mtk_crtc->base, &mtk_crtc_helper_funcs);
502
503 return 0;
504
505err_cleanup_crtc:
506 drm_crtc_cleanup(&mtk_crtc->base);
507 return ret;
508}
509
510void mtk_crtc_ddp_irq(struct drm_crtc *crtc, struct mtk_ddp_comp *comp)
511{
512 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
513 struct mtk_drm_private *priv = crtc->dev->dev_private;
514
515 if (!priv->data->shadow_register)
516 mtk_crtc_ddp_config(crtc);
517
518 mtk_drm_finish_page_flip(mtk_crtc);
519}
520
521int mtk_drm_crtc_create(struct drm_device *drm_dev,
522 const enum mtk_ddp_comp_id *path, unsigned int path_len)
523{
524 struct mtk_drm_private *priv = drm_dev->dev_private;
525 struct device *dev = drm_dev->dev;
526 struct mtk_drm_crtc *mtk_crtc;
527 enum drm_plane_type type;
528 unsigned int zpos;
529 int pipe = priv->num_pipes;
530 int ret;
531 int i;
532
533 if (!path)
534 return 0;
535
536 for (i = 0; i < path_len; i++) {
537 enum mtk_ddp_comp_id comp_id = path[i];
538 struct device_node *node;
539
540 node = priv->comp_node[comp_id];
541 if (!node) {
542 dev_info(dev,
543 "Not creating crtc %d because component %d is disabled or missing\n",
544 pipe, comp_id);
545 return 0;
546 }
547 }
548
549 mtk_crtc = devm_kzalloc(dev, sizeof(*mtk_crtc), GFP_KERNEL);
550 if (!mtk_crtc)
551 return -ENOMEM;
552
553 mtk_crtc->config_regs = priv->config_regs;
554 mtk_crtc->ddp_comp_nr = path_len;
555 mtk_crtc->ddp_comp = devm_kmalloc_array(dev, mtk_crtc->ddp_comp_nr,
556 sizeof(*mtk_crtc->ddp_comp),
557 GFP_KERNEL);
558 if (!mtk_crtc->ddp_comp)
559 return -ENOMEM;
560
561 mtk_crtc->mutex = mtk_disp_mutex_get(priv->mutex_dev, pipe);
562 if (IS_ERR(mtk_crtc->mutex)) {
563 ret = PTR_ERR(mtk_crtc->mutex);
564 dev_err(dev, "Failed to get mutex: %d\n", ret);
565 return ret;
566 }
567
568 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
569 enum mtk_ddp_comp_id comp_id = path[i];
570 struct mtk_ddp_comp *comp;
571 struct device_node *node;
572
573 node = priv->comp_node[comp_id];
574 comp = priv->ddp_comp[comp_id];
575 if (!comp) {
576 dev_err(dev, "Component %pOF not initialized\n", node);
577 ret = -ENODEV;
578 return ret;
579 }
580
581 mtk_crtc->ddp_comp[i] = comp;
582 }
583
584 mtk_crtc->layer_nr = mtk_ddp_comp_layer_nr(mtk_crtc->ddp_comp[0]);
585 mtk_crtc->planes = devm_kcalloc(dev, mtk_crtc->layer_nr,
586 sizeof(struct drm_plane),
587 GFP_KERNEL);
588
589 for (zpos = 0; zpos < mtk_crtc->layer_nr; zpos++) {
590 type = (zpos == 0) ? DRM_PLANE_TYPE_PRIMARY :
591 (zpos == 1) ? DRM_PLANE_TYPE_CURSOR :
592 DRM_PLANE_TYPE_OVERLAY;
593 ret = mtk_plane_init(drm_dev, &mtk_crtc->planes[zpos],
594 BIT(pipe), type);
595 if (ret)
596 return ret;
597 }
598
599 ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, &mtk_crtc->planes[0],
600 mtk_crtc->layer_nr > 1 ? &mtk_crtc->planes[1] :
601 NULL, pipe);
602 if (ret < 0)
603 return ret;
604 drm_mode_crtc_set_gamma_size(&mtk_crtc->base, MTK_LUT_SIZE);
605 drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, MTK_LUT_SIZE);
606 priv->num_pipes++;
607
608 return 0;
609}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2015 MediaTek Inc.
4 */
5
6#include <linux/clk.h>
7#include <linux/dma-mapping.h>
8#include <linux/mailbox_controller.h>
9#include <linux/of.h>
10#include <linux/pm_runtime.h>
11#include <linux/soc/mediatek/mtk-cmdq.h>
12#include <linux/soc/mediatek/mtk-mmsys.h>
13#include <linux/soc/mediatek/mtk-mutex.h>
14
15#include <asm/barrier.h>
16
17#include <drm/drm_atomic.h>
18#include <drm/drm_atomic_helper.h>
19#include <drm/drm_probe_helper.h>
20#include <drm/drm_vblank.h>
21
22#include "mtk_drm_drv.h"
23#include "mtk_drm_crtc.h"
24#include "mtk_drm_ddp_comp.h"
25#include "mtk_drm_gem.h"
26#include "mtk_drm_plane.h"
27
28/*
29 * struct mtk_drm_crtc - MediaTek specific crtc structure.
30 * @base: crtc object.
31 * @enabled: records whether crtc_enable succeeded
32 * @planes: array of 4 drm_plane structures, one for each overlay plane
33 * @pending_planes: whether any plane has pending changes to be applied
34 * @mmsys_dev: pointer to the mmsys device for configuration registers
35 * @mutex: handle to one of the ten disp_mutex streams
36 * @ddp_comp_nr: number of components in ddp_comp
37 * @ddp_comp: array of pointers the mtk_ddp_comp structures used by this crtc
38 *
39 * TODO: Needs update: this header is missing a bunch of member descriptions.
40 */
41struct mtk_drm_crtc {
42 struct drm_crtc base;
43 bool enabled;
44
45 bool pending_needs_vblank;
46 struct drm_pending_vblank_event *event;
47
48 struct drm_plane *planes;
49 unsigned int layer_nr;
50 bool pending_planes;
51 bool pending_async_planes;
52
53#if IS_REACHABLE(CONFIG_MTK_CMDQ)
54 struct cmdq_client cmdq_client;
55 struct cmdq_pkt cmdq_handle;
56 u32 cmdq_event;
57 u32 cmdq_vblank_cnt;
58 wait_queue_head_t cb_blocking_queue;
59#endif
60
61 struct device *mmsys_dev;
62 struct device *dma_dev;
63 struct mtk_mutex *mutex;
64 unsigned int ddp_comp_nr;
65 struct mtk_ddp_comp **ddp_comp;
66 unsigned int num_conn_routes;
67 const struct mtk_drm_route *conn_routes;
68
69 /* lock for display hardware access */
70 struct mutex hw_lock;
71 bool config_updating;
72};
73
74struct mtk_crtc_state {
75 struct drm_crtc_state base;
76
77 bool pending_config;
78 unsigned int pending_width;
79 unsigned int pending_height;
80 unsigned int pending_vrefresh;
81};
82
83static inline struct mtk_drm_crtc *to_mtk_crtc(struct drm_crtc *c)
84{
85 return container_of(c, struct mtk_drm_crtc, base);
86}
87
88static inline struct mtk_crtc_state *to_mtk_crtc_state(struct drm_crtc_state *s)
89{
90 return container_of(s, struct mtk_crtc_state, base);
91}
92
93static void mtk_drm_crtc_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
94{
95 struct drm_crtc *crtc = &mtk_crtc->base;
96 unsigned long flags;
97
98 spin_lock_irqsave(&crtc->dev->event_lock, flags);
99 drm_crtc_send_vblank_event(crtc, mtk_crtc->event);
100 drm_crtc_vblank_put(crtc);
101 mtk_crtc->event = NULL;
102 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
103}
104
105static void mtk_drm_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
106{
107 drm_crtc_handle_vblank(&mtk_crtc->base);
108 if (!mtk_crtc->config_updating && mtk_crtc->pending_needs_vblank) {
109 mtk_drm_crtc_finish_page_flip(mtk_crtc);
110 mtk_crtc->pending_needs_vblank = false;
111 }
112}
113
114#if IS_REACHABLE(CONFIG_MTK_CMDQ)
115static int mtk_drm_cmdq_pkt_create(struct cmdq_client *client, struct cmdq_pkt *pkt,
116 size_t size)
117{
118 struct device *dev;
119 dma_addr_t dma_addr;
120
121 pkt->va_base = kzalloc(size, GFP_KERNEL);
122 if (!pkt->va_base)
123 return -ENOMEM;
124
125 pkt->buf_size = size;
126 pkt->cl = (void *)client;
127
128 dev = client->chan->mbox->dev;
129 dma_addr = dma_map_single(dev, pkt->va_base, pkt->buf_size,
130 DMA_TO_DEVICE);
131 if (dma_mapping_error(dev, dma_addr)) {
132 dev_err(dev, "dma map failed, size=%u\n", (u32)(u64)size);
133 kfree(pkt->va_base);
134 return -ENOMEM;
135 }
136
137 pkt->pa_base = dma_addr;
138
139 return 0;
140}
141
142static void mtk_drm_cmdq_pkt_destroy(struct cmdq_pkt *pkt)
143{
144 struct cmdq_client *client = (struct cmdq_client *)pkt->cl;
145
146 dma_unmap_single(client->chan->mbox->dev, pkt->pa_base, pkt->buf_size,
147 DMA_TO_DEVICE);
148 kfree(pkt->va_base);
149}
150#endif
151
152static void mtk_drm_crtc_destroy(struct drm_crtc *crtc)
153{
154 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
155 int i;
156
157 mtk_mutex_put(mtk_crtc->mutex);
158#if IS_REACHABLE(CONFIG_MTK_CMDQ)
159 mtk_drm_cmdq_pkt_destroy(&mtk_crtc->cmdq_handle);
160
161 if (mtk_crtc->cmdq_client.chan) {
162 mbox_free_channel(mtk_crtc->cmdq_client.chan);
163 mtk_crtc->cmdq_client.chan = NULL;
164 }
165#endif
166
167 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
168 struct mtk_ddp_comp *comp;
169
170 comp = mtk_crtc->ddp_comp[i];
171 mtk_ddp_comp_unregister_vblank_cb(comp);
172 }
173
174 drm_crtc_cleanup(crtc);
175}
176
177static void mtk_drm_crtc_reset(struct drm_crtc *crtc)
178{
179 struct mtk_crtc_state *state;
180
181 if (crtc->state)
182 __drm_atomic_helper_crtc_destroy_state(crtc->state);
183
184 kfree(to_mtk_crtc_state(crtc->state));
185 crtc->state = NULL;
186
187 state = kzalloc(sizeof(*state), GFP_KERNEL);
188 if (state)
189 __drm_atomic_helper_crtc_reset(crtc, &state->base);
190}
191
192static struct drm_crtc_state *mtk_drm_crtc_duplicate_state(struct drm_crtc *crtc)
193{
194 struct mtk_crtc_state *state;
195
196 state = kmalloc(sizeof(*state), GFP_KERNEL);
197 if (!state)
198 return NULL;
199
200 __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
201
202 WARN_ON(state->base.crtc != crtc);
203 state->base.crtc = crtc;
204 state->pending_config = false;
205
206 return &state->base;
207}
208
209static void mtk_drm_crtc_destroy_state(struct drm_crtc *crtc,
210 struct drm_crtc_state *state)
211{
212 __drm_atomic_helper_crtc_destroy_state(state);
213 kfree(to_mtk_crtc_state(state));
214}
215
216static bool mtk_drm_crtc_mode_fixup(struct drm_crtc *crtc,
217 const struct drm_display_mode *mode,
218 struct drm_display_mode *adjusted_mode)
219{
220 /* Nothing to do here, but this callback is mandatory. */
221 return true;
222}
223
224static void mtk_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
225{
226 struct mtk_crtc_state *state = to_mtk_crtc_state(crtc->state);
227
228 state->pending_width = crtc->mode.hdisplay;
229 state->pending_height = crtc->mode.vdisplay;
230 state->pending_vrefresh = drm_mode_vrefresh(&crtc->mode);
231 wmb(); /* Make sure the above parameters are set before update */
232 state->pending_config = true;
233}
234
235static int mtk_crtc_ddp_clk_enable(struct mtk_drm_crtc *mtk_crtc)
236{
237 int ret;
238 int i;
239
240 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
241 ret = mtk_ddp_comp_clk_enable(mtk_crtc->ddp_comp[i]);
242 if (ret) {
243 DRM_ERROR("Failed to enable clock %d: %d\n", i, ret);
244 goto err;
245 }
246 }
247
248 return 0;
249err:
250 while (--i >= 0)
251 mtk_ddp_comp_clk_disable(mtk_crtc->ddp_comp[i]);
252 return ret;
253}
254
255static void mtk_crtc_ddp_clk_disable(struct mtk_drm_crtc *mtk_crtc)
256{
257 int i;
258
259 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
260 mtk_ddp_comp_clk_disable(mtk_crtc->ddp_comp[i]);
261}
262
263static
264struct mtk_ddp_comp *mtk_drm_ddp_comp_for_plane(struct drm_crtc *crtc,
265 struct drm_plane *plane,
266 unsigned int *local_layer)
267{
268 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
269 struct mtk_ddp_comp *comp;
270 int i, count = 0;
271 unsigned int local_index = plane - mtk_crtc->planes;
272
273 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
274 comp = mtk_crtc->ddp_comp[i];
275 if (local_index < (count + mtk_ddp_comp_layer_nr(comp))) {
276 *local_layer = local_index - count;
277 return comp;
278 }
279 count += mtk_ddp_comp_layer_nr(comp);
280 }
281
282 WARN(1, "Failed to find component for plane %d\n", plane->index);
283 return NULL;
284}
285
286#if IS_REACHABLE(CONFIG_MTK_CMDQ)
287static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg)
288{
289 struct cmdq_cb_data *data = mssg;
290 struct cmdq_client *cmdq_cl = container_of(cl, struct cmdq_client, client);
291 struct mtk_drm_crtc *mtk_crtc = container_of(cmdq_cl, struct mtk_drm_crtc, cmdq_client);
292 struct mtk_crtc_state *state;
293 unsigned int i;
294
295 if (data->sta < 0)
296 return;
297
298 state = to_mtk_crtc_state(mtk_crtc->base.state);
299
300 state->pending_config = false;
301
302 if (mtk_crtc->pending_planes) {
303 for (i = 0; i < mtk_crtc->layer_nr; i++) {
304 struct drm_plane *plane = &mtk_crtc->planes[i];
305 struct mtk_plane_state *plane_state;
306
307 plane_state = to_mtk_plane_state(plane->state);
308
309 plane_state->pending.config = false;
310 }
311 mtk_crtc->pending_planes = false;
312 }
313
314 if (mtk_crtc->pending_async_planes) {
315 for (i = 0; i < mtk_crtc->layer_nr; i++) {
316 struct drm_plane *plane = &mtk_crtc->planes[i];
317 struct mtk_plane_state *plane_state;
318
319 plane_state = to_mtk_plane_state(plane->state);
320
321 plane_state->pending.async_config = false;
322 }
323 mtk_crtc->pending_async_planes = false;
324 }
325
326 mtk_crtc->cmdq_vblank_cnt = 0;
327 wake_up(&mtk_crtc->cb_blocking_queue);
328}
329#endif
330
331static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
332{
333 struct drm_crtc *crtc = &mtk_crtc->base;
334 struct drm_connector *connector;
335 struct drm_encoder *encoder;
336 struct drm_connector_list_iter conn_iter;
337 unsigned int width, height, vrefresh, bpc = MTK_MAX_BPC;
338 int ret;
339 int i;
340
341 if (WARN_ON(!crtc->state))
342 return -EINVAL;
343
344 width = crtc->state->adjusted_mode.hdisplay;
345 height = crtc->state->adjusted_mode.vdisplay;
346 vrefresh = drm_mode_vrefresh(&crtc->state->adjusted_mode);
347
348 drm_for_each_encoder(encoder, crtc->dev) {
349 if (encoder->crtc != crtc)
350 continue;
351
352 drm_connector_list_iter_begin(crtc->dev, &conn_iter);
353 drm_for_each_connector_iter(connector, &conn_iter) {
354 if (connector->encoder != encoder)
355 continue;
356 if (connector->display_info.bpc != 0 &&
357 bpc > connector->display_info.bpc)
358 bpc = connector->display_info.bpc;
359 }
360 drm_connector_list_iter_end(&conn_iter);
361 }
362
363 ret = pm_runtime_resume_and_get(crtc->dev->dev);
364 if (ret < 0) {
365 DRM_ERROR("Failed to enable power domain: %d\n", ret);
366 return ret;
367 }
368
369 ret = mtk_mutex_prepare(mtk_crtc->mutex);
370 if (ret < 0) {
371 DRM_ERROR("Failed to enable mutex clock: %d\n", ret);
372 goto err_pm_runtime_put;
373 }
374
375 ret = mtk_crtc_ddp_clk_enable(mtk_crtc);
376 if (ret < 0) {
377 DRM_ERROR("Failed to enable component clocks: %d\n", ret);
378 goto err_mutex_unprepare;
379 }
380
381 for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
382 if (!mtk_ddp_comp_connect(mtk_crtc->ddp_comp[i], mtk_crtc->mmsys_dev,
383 mtk_crtc->ddp_comp[i + 1]->id))
384 mtk_mmsys_ddp_connect(mtk_crtc->mmsys_dev,
385 mtk_crtc->ddp_comp[i]->id,
386 mtk_crtc->ddp_comp[i + 1]->id);
387 if (!mtk_ddp_comp_add(mtk_crtc->ddp_comp[i], mtk_crtc->mutex))
388 mtk_mutex_add_comp(mtk_crtc->mutex,
389 mtk_crtc->ddp_comp[i]->id);
390 }
391 if (!mtk_ddp_comp_add(mtk_crtc->ddp_comp[i], mtk_crtc->mutex))
392 mtk_mutex_add_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
393 mtk_mutex_enable(mtk_crtc->mutex);
394
395 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
396 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[i];
397
398 if (i == 1)
399 mtk_ddp_comp_bgclr_in_on(comp);
400
401 mtk_ddp_comp_config(comp, width, height, vrefresh, bpc, NULL);
402 mtk_ddp_comp_start(comp);
403 }
404
405 /* Initially configure all planes */
406 for (i = 0; i < mtk_crtc->layer_nr; i++) {
407 struct drm_plane *plane = &mtk_crtc->planes[i];
408 struct mtk_plane_state *plane_state;
409 struct mtk_ddp_comp *comp;
410 unsigned int local_layer;
411
412 plane_state = to_mtk_plane_state(plane->state);
413
414 /* should not enable layer before crtc enabled */
415 plane_state->pending.enable = false;
416 comp = mtk_drm_ddp_comp_for_plane(crtc, plane, &local_layer);
417 if (comp)
418 mtk_ddp_comp_layer_config(comp, local_layer,
419 plane_state, NULL);
420 }
421
422 return 0;
423
424err_mutex_unprepare:
425 mtk_mutex_unprepare(mtk_crtc->mutex);
426err_pm_runtime_put:
427 pm_runtime_put(crtc->dev->dev);
428 return ret;
429}
430
431static void mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc *mtk_crtc)
432{
433 struct drm_device *drm = mtk_crtc->base.dev;
434 struct drm_crtc *crtc = &mtk_crtc->base;
435 int i;
436
437 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
438 mtk_ddp_comp_stop(mtk_crtc->ddp_comp[i]);
439 if (i == 1)
440 mtk_ddp_comp_bgclr_in_off(mtk_crtc->ddp_comp[i]);
441 }
442
443 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
444 if (!mtk_ddp_comp_remove(mtk_crtc->ddp_comp[i], mtk_crtc->mutex))
445 mtk_mutex_remove_comp(mtk_crtc->mutex,
446 mtk_crtc->ddp_comp[i]->id);
447 mtk_mutex_disable(mtk_crtc->mutex);
448 for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
449 if (!mtk_ddp_comp_disconnect(mtk_crtc->ddp_comp[i], mtk_crtc->mmsys_dev,
450 mtk_crtc->ddp_comp[i + 1]->id))
451 mtk_mmsys_ddp_disconnect(mtk_crtc->mmsys_dev,
452 mtk_crtc->ddp_comp[i]->id,
453 mtk_crtc->ddp_comp[i + 1]->id);
454 if (!mtk_ddp_comp_remove(mtk_crtc->ddp_comp[i], mtk_crtc->mutex))
455 mtk_mutex_remove_comp(mtk_crtc->mutex,
456 mtk_crtc->ddp_comp[i]->id);
457 }
458 if (!mtk_ddp_comp_remove(mtk_crtc->ddp_comp[i], mtk_crtc->mutex))
459 mtk_mutex_remove_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
460 mtk_crtc_ddp_clk_disable(mtk_crtc);
461 mtk_mutex_unprepare(mtk_crtc->mutex);
462
463 pm_runtime_put(drm->dev);
464
465 if (crtc->state->event && !crtc->state->active) {
466 spin_lock_irq(&crtc->dev->event_lock);
467 drm_crtc_send_vblank_event(crtc, crtc->state->event);
468 crtc->state->event = NULL;
469 spin_unlock_irq(&crtc->dev->event_lock);
470 }
471}
472
473static void mtk_crtc_ddp_config(struct drm_crtc *crtc,
474 struct cmdq_pkt *cmdq_handle)
475{
476 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
477 struct mtk_crtc_state *state = to_mtk_crtc_state(mtk_crtc->base.state);
478 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
479 unsigned int i;
480 unsigned int local_layer;
481
482 /*
483 * TODO: instead of updating the registers here, we should prepare
484 * working registers in atomic_commit and let the hardware command
485 * queue update module registers on vblank.
486 */
487 if (state->pending_config) {
488 mtk_ddp_comp_config(comp, state->pending_width,
489 state->pending_height,
490 state->pending_vrefresh, 0,
491 cmdq_handle);
492
493 if (!cmdq_handle)
494 state->pending_config = false;
495 }
496
497 if (mtk_crtc->pending_planes) {
498 for (i = 0; i < mtk_crtc->layer_nr; i++) {
499 struct drm_plane *plane = &mtk_crtc->planes[i];
500 struct mtk_plane_state *plane_state;
501
502 plane_state = to_mtk_plane_state(plane->state);
503
504 if (!plane_state->pending.config)
505 continue;
506
507 comp = mtk_drm_ddp_comp_for_plane(crtc, plane,
508 &local_layer);
509
510 if (comp)
511 mtk_ddp_comp_layer_config(comp, local_layer,
512 plane_state,
513 cmdq_handle);
514 if (!cmdq_handle)
515 plane_state->pending.config = false;
516 }
517
518 if (!cmdq_handle)
519 mtk_crtc->pending_planes = false;
520 }
521
522 if (mtk_crtc->pending_async_planes) {
523 for (i = 0; i < mtk_crtc->layer_nr; i++) {
524 struct drm_plane *plane = &mtk_crtc->planes[i];
525 struct mtk_plane_state *plane_state;
526
527 plane_state = to_mtk_plane_state(plane->state);
528
529 if (!plane_state->pending.async_config)
530 continue;
531
532 comp = mtk_drm_ddp_comp_for_plane(crtc, plane,
533 &local_layer);
534
535 if (comp)
536 mtk_ddp_comp_layer_config(comp, local_layer,
537 plane_state,
538 cmdq_handle);
539 if (!cmdq_handle)
540 plane_state->pending.async_config = false;
541 }
542
543 if (!cmdq_handle)
544 mtk_crtc->pending_async_planes = false;
545 }
546}
547
548static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc,
549 bool needs_vblank)
550{
551#if IS_REACHABLE(CONFIG_MTK_CMDQ)
552 struct cmdq_pkt *cmdq_handle = &mtk_crtc->cmdq_handle;
553#endif
554 struct drm_crtc *crtc = &mtk_crtc->base;
555 struct mtk_drm_private *priv = crtc->dev->dev_private;
556 unsigned int pending_planes = 0, pending_async_planes = 0;
557 int i;
558
559 mutex_lock(&mtk_crtc->hw_lock);
560 mtk_crtc->config_updating = true;
561 if (needs_vblank)
562 mtk_crtc->pending_needs_vblank = true;
563
564 for (i = 0; i < mtk_crtc->layer_nr; i++) {
565 struct drm_plane *plane = &mtk_crtc->planes[i];
566 struct mtk_plane_state *plane_state;
567
568 plane_state = to_mtk_plane_state(plane->state);
569 if (plane_state->pending.dirty) {
570 plane_state->pending.config = true;
571 plane_state->pending.dirty = false;
572 pending_planes |= BIT(i);
573 } else if (plane_state->pending.async_dirty) {
574 plane_state->pending.async_config = true;
575 plane_state->pending.async_dirty = false;
576 pending_async_planes |= BIT(i);
577 }
578 }
579 if (pending_planes)
580 mtk_crtc->pending_planes = true;
581 if (pending_async_planes)
582 mtk_crtc->pending_async_planes = true;
583
584 if (priv->data->shadow_register) {
585 mtk_mutex_acquire(mtk_crtc->mutex);
586 mtk_crtc_ddp_config(crtc, NULL);
587 mtk_mutex_release(mtk_crtc->mutex);
588 }
589#if IS_REACHABLE(CONFIG_MTK_CMDQ)
590 if (mtk_crtc->cmdq_client.chan) {
591 mbox_flush(mtk_crtc->cmdq_client.chan, 2000);
592 cmdq_handle->cmd_buf_size = 0;
593 cmdq_pkt_clear_event(cmdq_handle, mtk_crtc->cmdq_event);
594 cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event, false);
595 mtk_crtc_ddp_config(crtc, cmdq_handle);
596 cmdq_pkt_finalize(cmdq_handle);
597 dma_sync_single_for_device(mtk_crtc->cmdq_client.chan->mbox->dev,
598 cmdq_handle->pa_base,
599 cmdq_handle->cmd_buf_size,
600 DMA_TO_DEVICE);
601 /*
602 * CMDQ command should execute in next 3 vblank.
603 * One vblank interrupt before send message (occasionally)
604 * and one vblank interrupt after cmdq done,
605 * so it's timeout after 3 vblank interrupt.
606 * If it fail to execute in next 3 vblank, timeout happen.
607 */
608 mtk_crtc->cmdq_vblank_cnt = 3;
609
610 mbox_send_message(mtk_crtc->cmdq_client.chan, cmdq_handle);
611 mbox_client_txdone(mtk_crtc->cmdq_client.chan, 0);
612 }
613#endif
614 mtk_crtc->config_updating = false;
615 mutex_unlock(&mtk_crtc->hw_lock);
616}
617
618static void mtk_crtc_ddp_irq(void *data)
619{
620 struct drm_crtc *crtc = data;
621 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
622 struct mtk_drm_private *priv = crtc->dev->dev_private;
623
624#if IS_REACHABLE(CONFIG_MTK_CMDQ)
625 if (!priv->data->shadow_register && !mtk_crtc->cmdq_client.chan)
626 mtk_crtc_ddp_config(crtc, NULL);
627 else if (mtk_crtc->cmdq_vblank_cnt > 0 && --mtk_crtc->cmdq_vblank_cnt == 0)
628 DRM_ERROR("mtk_crtc %d CMDQ execute command timeout!\n",
629 drm_crtc_index(&mtk_crtc->base));
630#else
631 if (!priv->data->shadow_register)
632 mtk_crtc_ddp_config(crtc, NULL);
633#endif
634 mtk_drm_finish_page_flip(mtk_crtc);
635}
636
637static int mtk_drm_crtc_enable_vblank(struct drm_crtc *crtc)
638{
639 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
640 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
641
642 mtk_ddp_comp_enable_vblank(comp);
643
644 return 0;
645}
646
647static void mtk_drm_crtc_disable_vblank(struct drm_crtc *crtc)
648{
649 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
650 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
651
652 mtk_ddp_comp_disable_vblank(comp);
653}
654
655static void mtk_drm_crtc_update_output(struct drm_crtc *crtc,
656 struct drm_atomic_state *state)
657{
658 int crtc_index = drm_crtc_index(crtc);
659 int i;
660 struct device *dev;
661 struct drm_crtc_state *crtc_state = state->crtcs[crtc_index].new_state;
662 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
663 struct mtk_drm_private *priv;
664 unsigned int encoder_mask = crtc_state->encoder_mask;
665
666 if (!crtc_state->connectors_changed)
667 return;
668
669 if (!mtk_crtc->num_conn_routes)
670 return;
671
672 priv = ((struct mtk_drm_private *)crtc->dev->dev_private)->all_drm_private[crtc_index];
673 dev = priv->dev;
674
675 dev_dbg(dev, "connector change:%d, encoder mask:0x%x for crtc:%d\n",
676 crtc_state->connectors_changed, encoder_mask, crtc_index);
677
678 for (i = 0; i < mtk_crtc->num_conn_routes; i++) {
679 unsigned int comp_id = mtk_crtc->conn_routes[i].route_ddp;
680 struct mtk_ddp_comp *comp = &priv->ddp_comp[comp_id];
681
682 if (comp->encoder_index >= 0 &&
683 (encoder_mask & BIT(comp->encoder_index))) {
684 mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr - 1] = comp;
685 dev_dbg(dev, "Add comp_id: %d at path index %d\n",
686 comp->id, mtk_crtc->ddp_comp_nr - 1);
687 break;
688 }
689 }
690}
691
692int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct drm_plane *plane,
693 struct mtk_plane_state *state)
694{
695 unsigned int local_layer;
696 struct mtk_ddp_comp *comp;
697
698 comp = mtk_drm_ddp_comp_for_plane(crtc, plane, &local_layer);
699 if (comp)
700 return mtk_ddp_comp_layer_check(comp, local_layer, state);
701 return 0;
702}
703
704void mtk_drm_crtc_async_update(struct drm_crtc *crtc, struct drm_plane *plane,
705 struct drm_atomic_state *state)
706{
707 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
708
709 if (!mtk_crtc->enabled)
710 return;
711
712 mtk_drm_crtc_update_config(mtk_crtc, false);
713}
714
715static void mtk_drm_crtc_atomic_enable(struct drm_crtc *crtc,
716 struct drm_atomic_state *state)
717{
718 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
719 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
720 int ret;
721
722 DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
723
724 ret = mtk_ddp_comp_power_on(comp);
725 if (ret < 0) {
726 DRM_DEV_ERROR(comp->dev, "Failed to enable power domain: %d\n", ret);
727 return;
728 }
729
730 mtk_drm_crtc_update_output(crtc, state);
731
732 ret = mtk_crtc_ddp_hw_init(mtk_crtc);
733 if (ret) {
734 mtk_ddp_comp_power_off(comp);
735 return;
736 }
737
738 drm_crtc_vblank_on(crtc);
739 mtk_crtc->enabled = true;
740}
741
742static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc,
743 struct drm_atomic_state *state)
744{
745 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
746 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
747 int i;
748
749 DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
750 if (!mtk_crtc->enabled)
751 return;
752
753 /* Set all pending plane state to disabled */
754 for (i = 0; i < mtk_crtc->layer_nr; i++) {
755 struct drm_plane *plane = &mtk_crtc->planes[i];
756 struct mtk_plane_state *plane_state;
757
758 plane_state = to_mtk_plane_state(plane->state);
759 plane_state->pending.enable = false;
760 plane_state->pending.config = true;
761 }
762 mtk_crtc->pending_planes = true;
763
764 mtk_drm_crtc_update_config(mtk_crtc, false);
765#if IS_REACHABLE(CONFIG_MTK_CMDQ)
766 /* Wait for planes to be disabled by cmdq */
767 if (mtk_crtc->cmdq_client.chan)
768 wait_event_timeout(mtk_crtc->cb_blocking_queue,
769 mtk_crtc->cmdq_vblank_cnt == 0,
770 msecs_to_jiffies(500));
771#endif
772 /* Wait for planes to be disabled */
773 drm_crtc_wait_one_vblank(crtc);
774
775 drm_crtc_vblank_off(crtc);
776 mtk_crtc_ddp_hw_fini(mtk_crtc);
777 mtk_ddp_comp_power_off(comp);
778
779 mtk_crtc->enabled = false;
780}
781
782static void mtk_drm_crtc_atomic_begin(struct drm_crtc *crtc,
783 struct drm_atomic_state *state)
784{
785 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
786 crtc);
787 struct mtk_crtc_state *mtk_crtc_state = to_mtk_crtc_state(crtc_state);
788 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
789 unsigned long flags;
790
791 if (mtk_crtc->event && mtk_crtc_state->base.event)
792 DRM_ERROR("new event while there is still a pending event\n");
793
794 if (mtk_crtc_state->base.event) {
795 mtk_crtc_state->base.event->pipe = drm_crtc_index(crtc);
796 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
797
798 spin_lock_irqsave(&crtc->dev->event_lock, flags);
799 mtk_crtc->event = mtk_crtc_state->base.event;
800 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
801
802 mtk_crtc_state->base.event = NULL;
803 }
804}
805
806static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
807 struct drm_atomic_state *state)
808{
809 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
810 int i;
811
812 if (crtc->state->color_mgmt_changed)
813 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
814 mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i], crtc->state);
815 mtk_ddp_ctm_set(mtk_crtc->ddp_comp[i], crtc->state);
816 }
817 mtk_drm_crtc_update_config(mtk_crtc, !!mtk_crtc->event);
818}
819
820static const struct drm_crtc_funcs mtk_crtc_funcs = {
821 .set_config = drm_atomic_helper_set_config,
822 .page_flip = drm_atomic_helper_page_flip,
823 .destroy = mtk_drm_crtc_destroy,
824 .reset = mtk_drm_crtc_reset,
825 .atomic_duplicate_state = mtk_drm_crtc_duplicate_state,
826 .atomic_destroy_state = mtk_drm_crtc_destroy_state,
827 .enable_vblank = mtk_drm_crtc_enable_vblank,
828 .disable_vblank = mtk_drm_crtc_disable_vblank,
829};
830
831static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
832 .mode_fixup = mtk_drm_crtc_mode_fixup,
833 .mode_set_nofb = mtk_drm_crtc_mode_set_nofb,
834 .atomic_begin = mtk_drm_crtc_atomic_begin,
835 .atomic_flush = mtk_drm_crtc_atomic_flush,
836 .atomic_enable = mtk_drm_crtc_atomic_enable,
837 .atomic_disable = mtk_drm_crtc_atomic_disable,
838};
839
840static int mtk_drm_crtc_init(struct drm_device *drm,
841 struct mtk_drm_crtc *mtk_crtc,
842 unsigned int pipe)
843{
844 struct drm_plane *primary = NULL;
845 struct drm_plane *cursor = NULL;
846 int i, ret;
847
848 for (i = 0; i < mtk_crtc->layer_nr; i++) {
849 if (mtk_crtc->planes[i].type == DRM_PLANE_TYPE_PRIMARY)
850 primary = &mtk_crtc->planes[i];
851 else if (mtk_crtc->planes[i].type == DRM_PLANE_TYPE_CURSOR)
852 cursor = &mtk_crtc->planes[i];
853 }
854
855 ret = drm_crtc_init_with_planes(drm, &mtk_crtc->base, primary, cursor,
856 &mtk_crtc_funcs, NULL);
857 if (ret)
858 goto err_cleanup_crtc;
859
860 drm_crtc_helper_add(&mtk_crtc->base, &mtk_crtc_helper_funcs);
861
862 return 0;
863
864err_cleanup_crtc:
865 drm_crtc_cleanup(&mtk_crtc->base);
866 return ret;
867}
868
869static int mtk_drm_crtc_num_comp_planes(struct mtk_drm_crtc *mtk_crtc,
870 int comp_idx)
871{
872 struct mtk_ddp_comp *comp;
873
874 if (comp_idx > 1)
875 return 0;
876
877 comp = mtk_crtc->ddp_comp[comp_idx];
878 if (!comp->funcs)
879 return 0;
880
881 if (comp_idx == 1 && !comp->funcs->bgclr_in_on)
882 return 0;
883
884 return mtk_ddp_comp_layer_nr(comp);
885}
886
887static inline
888enum drm_plane_type mtk_drm_crtc_plane_type(unsigned int plane_idx,
889 unsigned int num_planes)
890{
891 if (plane_idx == 0)
892 return DRM_PLANE_TYPE_PRIMARY;
893 else if (plane_idx == (num_planes - 1))
894 return DRM_PLANE_TYPE_CURSOR;
895 else
896 return DRM_PLANE_TYPE_OVERLAY;
897
898}
899
900static int mtk_drm_crtc_init_comp_planes(struct drm_device *drm_dev,
901 struct mtk_drm_crtc *mtk_crtc,
902 int comp_idx, int pipe)
903{
904 int num_planes = mtk_drm_crtc_num_comp_planes(mtk_crtc, comp_idx);
905 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[comp_idx];
906 int i, ret;
907
908 for (i = 0; i < num_planes; i++) {
909 ret = mtk_plane_init(drm_dev,
910 &mtk_crtc->planes[mtk_crtc->layer_nr],
911 BIT(pipe),
912 mtk_drm_crtc_plane_type(mtk_crtc->layer_nr,
913 num_planes),
914 mtk_ddp_comp_supported_rotations(comp),
915 mtk_ddp_comp_get_formats(comp),
916 mtk_ddp_comp_get_num_formats(comp));
917 if (ret)
918 return ret;
919
920 mtk_crtc->layer_nr++;
921 }
922 return 0;
923}
924
925struct device *mtk_drm_crtc_dma_dev_get(struct drm_crtc *crtc)
926{
927 struct mtk_drm_crtc *mtk_crtc = NULL;
928
929 if (!crtc)
930 return NULL;
931
932 mtk_crtc = to_mtk_crtc(crtc);
933 if (!mtk_crtc)
934 return NULL;
935
936 return mtk_crtc->dma_dev;
937}
938
939int mtk_drm_crtc_create(struct drm_device *drm_dev,
940 const unsigned int *path, unsigned int path_len,
941 int priv_data_index, const struct mtk_drm_route *conn_routes,
942 unsigned int num_conn_routes)
943{
944 struct mtk_drm_private *priv = drm_dev->dev_private;
945 struct device *dev = drm_dev->dev;
946 struct mtk_drm_crtc *mtk_crtc;
947 unsigned int num_comp_planes = 0;
948 int ret;
949 int i;
950 bool has_ctm = false;
951 uint gamma_lut_size = 0;
952 struct drm_crtc *tmp;
953 int crtc_i = 0;
954
955 if (!path)
956 return 0;
957
958 priv = priv->all_drm_private[priv_data_index];
959
960 drm_for_each_crtc(tmp, drm_dev)
961 crtc_i++;
962
963 for (i = 0; i < path_len; i++) {
964 enum mtk_ddp_comp_id comp_id = path[i];
965 struct device_node *node;
966 struct mtk_ddp_comp *comp;
967
968 node = priv->comp_node[comp_id];
969 comp = &priv->ddp_comp[comp_id];
970
971 /* Not all drm components have a DTS device node, such as ovl_adaptor,
972 * which is the drm bring up sub driver
973 */
974 if (!node && comp_id != DDP_COMPONENT_DRM_OVL_ADAPTOR) {
975 dev_info(dev,
976 "Not creating crtc %d because component %d is disabled or missing\n",
977 crtc_i, comp_id);
978 return 0;
979 }
980
981 if (!comp->dev) {
982 dev_err(dev, "Component %pOF not initialized\n", node);
983 return -ENODEV;
984 }
985 }
986
987 mtk_crtc = devm_kzalloc(dev, sizeof(*mtk_crtc), GFP_KERNEL);
988 if (!mtk_crtc)
989 return -ENOMEM;
990
991 mtk_crtc->mmsys_dev = priv->mmsys_dev;
992 mtk_crtc->ddp_comp_nr = path_len;
993 mtk_crtc->ddp_comp = devm_kmalloc_array(dev,
994 mtk_crtc->ddp_comp_nr + (conn_routes ? 1 : 0),
995 sizeof(*mtk_crtc->ddp_comp),
996 GFP_KERNEL);
997 if (!mtk_crtc->ddp_comp)
998 return -ENOMEM;
999
1000 mtk_crtc->mutex = mtk_mutex_get(priv->mutex_dev);
1001 if (IS_ERR(mtk_crtc->mutex)) {
1002 ret = PTR_ERR(mtk_crtc->mutex);
1003 dev_err(dev, "Failed to get mutex: %d\n", ret);
1004 return ret;
1005 }
1006
1007 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
1008 unsigned int comp_id = path[i];
1009 struct mtk_ddp_comp *comp;
1010
1011 comp = &priv->ddp_comp[comp_id];
1012 mtk_crtc->ddp_comp[i] = comp;
1013
1014 if (comp->funcs) {
1015 if (comp->funcs->gamma_set && comp->funcs->gamma_get_lut_size) {
1016 unsigned int lut_sz = mtk_ddp_gamma_get_lut_size(comp);
1017
1018 if (lut_sz)
1019 gamma_lut_size = lut_sz;
1020 }
1021
1022 if (comp->funcs->ctm_set)
1023 has_ctm = true;
1024 }
1025
1026 mtk_ddp_comp_register_vblank_cb(comp, mtk_crtc_ddp_irq,
1027 &mtk_crtc->base);
1028 }
1029
1030 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
1031 num_comp_planes += mtk_drm_crtc_num_comp_planes(mtk_crtc, i);
1032
1033 mtk_crtc->planes = devm_kcalloc(dev, num_comp_planes,
1034 sizeof(struct drm_plane), GFP_KERNEL);
1035 if (!mtk_crtc->planes)
1036 return -ENOMEM;
1037
1038 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
1039 ret = mtk_drm_crtc_init_comp_planes(drm_dev, mtk_crtc, i,
1040 crtc_i);
1041 if (ret)
1042 return ret;
1043 }
1044
1045 /*
1046 * Default to use the first component as the dma dev.
1047 * In the case of ovl_adaptor sub driver, it needs to use the
1048 * dma_dev_get function to get representative dma dev.
1049 */
1050 mtk_crtc->dma_dev = mtk_ddp_comp_dma_dev_get(&priv->ddp_comp[path[0]]);
1051
1052 ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, crtc_i);
1053 if (ret < 0)
1054 return ret;
1055
1056 if (gamma_lut_size)
1057 drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size);
1058 drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, has_ctm, gamma_lut_size);
1059 mutex_init(&mtk_crtc->hw_lock);
1060
1061#if IS_REACHABLE(CONFIG_MTK_CMDQ)
1062 i = priv->mbox_index++;
1063 mtk_crtc->cmdq_client.client.dev = mtk_crtc->mmsys_dev;
1064 mtk_crtc->cmdq_client.client.tx_block = false;
1065 mtk_crtc->cmdq_client.client.knows_txdone = true;
1066 mtk_crtc->cmdq_client.client.rx_callback = ddp_cmdq_cb;
1067 mtk_crtc->cmdq_client.chan =
1068 mbox_request_channel(&mtk_crtc->cmdq_client.client, i);
1069 if (IS_ERR(mtk_crtc->cmdq_client.chan)) {
1070 dev_dbg(dev, "mtk_crtc %d failed to create mailbox client, writing register by CPU now\n",
1071 drm_crtc_index(&mtk_crtc->base));
1072 mtk_crtc->cmdq_client.chan = NULL;
1073 }
1074
1075 if (mtk_crtc->cmdq_client.chan) {
1076 ret = of_property_read_u32_index(priv->mutex_node,
1077 "mediatek,gce-events",
1078 i,
1079 &mtk_crtc->cmdq_event);
1080 if (ret) {
1081 dev_dbg(dev, "mtk_crtc %d failed to get mediatek,gce-events property\n",
1082 drm_crtc_index(&mtk_crtc->base));
1083 mbox_free_channel(mtk_crtc->cmdq_client.chan);
1084 mtk_crtc->cmdq_client.chan = NULL;
1085 } else {
1086 ret = mtk_drm_cmdq_pkt_create(&mtk_crtc->cmdq_client,
1087 &mtk_crtc->cmdq_handle,
1088 PAGE_SIZE);
1089 if (ret) {
1090 dev_dbg(dev, "mtk_crtc %d failed to create cmdq packet\n",
1091 drm_crtc_index(&mtk_crtc->base));
1092 mbox_free_channel(mtk_crtc->cmdq_client.chan);
1093 mtk_crtc->cmdq_client.chan = NULL;
1094 }
1095 }
1096
1097 /* for sending blocking cmd in crtc disable */
1098 init_waitqueue_head(&mtk_crtc->cb_blocking_queue);
1099 }
1100#endif
1101
1102 if (conn_routes) {
1103 for (i = 0; i < num_conn_routes; i++) {
1104 unsigned int comp_id = conn_routes[i].route_ddp;
1105 struct device_node *node = priv->comp_node[comp_id];
1106 struct mtk_ddp_comp *comp = &priv->ddp_comp[comp_id];
1107
1108 if (!comp->dev) {
1109 dev_dbg(dev, "comp_id:%d, Component %pOF not initialized\n",
1110 comp_id, node);
1111 /* mark encoder_index to -1, if route comp device is not enabled */
1112 comp->encoder_index = -1;
1113 continue;
1114 }
1115
1116 mtk_ddp_comp_encoder_index_set(&priv->ddp_comp[comp_id]);
1117 }
1118
1119 mtk_crtc->num_conn_routes = num_conn_routes;
1120 mtk_crtc->conn_routes = conn_routes;
1121
1122 /* increase ddp_comp_nr at the end of mtk_drm_crtc_create */
1123 mtk_crtc->ddp_comp_nr++;
1124 }
1125
1126 return 0;
1127}