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 #include <linux/soc/mediatek/mtk-cmdq.h>
9 #include <linux/soc/mediatek/mtk-mmsys.h>
10
11 #include <asm/barrier.h>
12 #include <soc/mediatek/smi.h>
13
14 #include <drm/drm_atomic_helper.h>
15 #include <drm/drm_plane_helper.h>
16 #include <drm/drm_probe_helper.h>
17 #include <drm/drm_vblank.h>
18
19 #include "mtk_drm_drv.h"
20 #include "mtk_drm_crtc.h"
21 #include "mtk_drm_ddp.h"
22 #include "mtk_drm_ddp_comp.h"
23 #include "mtk_drm_gem.h"
24 #include "mtk_drm_plane.h"
25
26 /**
27 * struct mtk_drm_crtc - MediaTek specific crtc structure.
28 * @base: crtc object.
29 * @enabled: records whether crtc_enable succeeded
30 * @planes: array of 4 drm_plane structures, one for each overlay plane
31 * @pending_planes: whether any plane has pending changes to be applied
32 * @mmsys_dev: pointer to the mmsys device for configuration registers
33 * @mutex: handle to one of the ten disp_mutex streams
34 * @ddp_comp_nr: number of components in ddp_comp
35 * @ddp_comp: array of pointers the mtk_ddp_comp structures used by this crtc
36 */
37 struct mtk_drm_crtc {
38 struct drm_crtc base;
39 bool enabled;
40
41 bool pending_needs_vblank;
42 struct drm_pending_vblank_event *event;
43
44 struct drm_plane *planes;
45 unsigned int layer_nr;
46 bool pending_planes;
47 bool pending_async_planes;
48
49 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
50 struct cmdq_client *cmdq_client;
51 u32 cmdq_event;
52 #endif
53
54 struct device *mmsys_dev;
55 struct mtk_disp_mutex *mutex;
56 unsigned int ddp_comp_nr;
57 struct mtk_ddp_comp **ddp_comp;
58
59 /* lock for display hardware access */
60 struct mutex hw_lock;
61 };
62
63 struct mtk_crtc_state {
64 struct drm_crtc_state base;
65
66 bool pending_config;
67 unsigned int pending_width;
68 unsigned int pending_height;
69 unsigned int pending_vrefresh;
70 };
71
to_mtk_crtc(struct drm_crtc * c)72 static inline struct mtk_drm_crtc *to_mtk_crtc(struct drm_crtc *c)
73 {
74 return container_of(c, struct mtk_drm_crtc, base);
75 }
76
to_mtk_crtc_state(struct drm_crtc_state * s)77 static inline struct mtk_crtc_state *to_mtk_crtc_state(struct drm_crtc_state *s)
78 {
79 return container_of(s, struct mtk_crtc_state, base);
80 }
81
mtk_drm_crtc_finish_page_flip(struct mtk_drm_crtc * mtk_crtc)82 static void mtk_drm_crtc_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
83 {
84 struct drm_crtc *crtc = &mtk_crtc->base;
85 unsigned long flags;
86
87 spin_lock_irqsave(&crtc->dev->event_lock, flags);
88 drm_crtc_send_vblank_event(crtc, mtk_crtc->event);
89 drm_crtc_vblank_put(crtc);
90 mtk_crtc->event = NULL;
91 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
92 }
93
mtk_drm_finish_page_flip(struct mtk_drm_crtc * mtk_crtc)94 static void mtk_drm_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
95 {
96 drm_crtc_handle_vblank(&mtk_crtc->base);
97 if (mtk_crtc->pending_needs_vblank) {
98 mtk_drm_crtc_finish_page_flip(mtk_crtc);
99 mtk_crtc->pending_needs_vblank = false;
100 }
101 }
102
mtk_drm_crtc_destroy(struct drm_crtc * crtc)103 static void mtk_drm_crtc_destroy(struct drm_crtc *crtc)
104 {
105 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
106
107 mtk_disp_mutex_put(mtk_crtc->mutex);
108
109 drm_crtc_cleanup(crtc);
110 }
111
mtk_drm_crtc_reset(struct drm_crtc * crtc)112 static void mtk_drm_crtc_reset(struct drm_crtc *crtc)
113 {
114 struct mtk_crtc_state *state;
115
116 if (crtc->state)
117 __drm_atomic_helper_crtc_destroy_state(crtc->state);
118
119 kfree(to_mtk_crtc_state(crtc->state));
120 crtc->state = NULL;
121
122 state = kzalloc(sizeof(*state), GFP_KERNEL);
123 if (state)
124 __drm_atomic_helper_crtc_reset(crtc, &state->base);
125 }
126
mtk_drm_crtc_duplicate_state(struct drm_crtc * crtc)127 static struct drm_crtc_state *mtk_drm_crtc_duplicate_state(struct drm_crtc *crtc)
128 {
129 struct mtk_crtc_state *state;
130
131 state = kzalloc(sizeof(*state), GFP_KERNEL);
132 if (!state)
133 return NULL;
134
135 __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
136
137 WARN_ON(state->base.crtc != crtc);
138 state->base.crtc = crtc;
139
140 return &state->base;
141 }
142
mtk_drm_crtc_destroy_state(struct drm_crtc * crtc,struct drm_crtc_state * state)143 static void mtk_drm_crtc_destroy_state(struct drm_crtc *crtc,
144 struct drm_crtc_state *state)
145 {
146 __drm_atomic_helper_crtc_destroy_state(state);
147 kfree(to_mtk_crtc_state(state));
148 }
149
mtk_drm_crtc_mode_fixup(struct drm_crtc * crtc,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)150 static bool mtk_drm_crtc_mode_fixup(struct drm_crtc *crtc,
151 const struct drm_display_mode *mode,
152 struct drm_display_mode *adjusted_mode)
153 {
154 /* Nothing to do here, but this callback is mandatory. */
155 return true;
156 }
157
mtk_drm_crtc_mode_set_nofb(struct drm_crtc * crtc)158 static void mtk_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
159 {
160 struct mtk_crtc_state *state = to_mtk_crtc_state(crtc->state);
161
162 state->pending_width = crtc->mode.hdisplay;
163 state->pending_height = crtc->mode.vdisplay;
164 state->pending_vrefresh = drm_mode_vrefresh(&crtc->mode);
165 wmb(); /* Make sure the above parameters are set before update */
166 state->pending_config = true;
167 }
168
mtk_drm_crtc_enable_vblank(struct drm_crtc * crtc)169 static int mtk_drm_crtc_enable_vblank(struct drm_crtc *crtc)
170 {
171 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
172 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
173
174 mtk_ddp_comp_enable_vblank(comp, &mtk_crtc->base);
175
176 return 0;
177 }
178
mtk_drm_crtc_disable_vblank(struct drm_crtc * crtc)179 static void mtk_drm_crtc_disable_vblank(struct drm_crtc *crtc)
180 {
181 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
182 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
183
184 mtk_ddp_comp_disable_vblank(comp);
185 }
186
mtk_crtc_ddp_clk_enable(struct mtk_drm_crtc * mtk_crtc)187 static int mtk_crtc_ddp_clk_enable(struct mtk_drm_crtc *mtk_crtc)
188 {
189 int ret;
190 int i;
191
192 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
193 ret = clk_prepare_enable(mtk_crtc->ddp_comp[i]->clk);
194 if (ret) {
195 DRM_ERROR("Failed to enable clock %d: %d\n", i, ret);
196 goto err;
197 }
198 }
199
200 return 0;
201 err:
202 while (--i >= 0)
203 clk_disable_unprepare(mtk_crtc->ddp_comp[i]->clk);
204 return ret;
205 }
206
mtk_crtc_ddp_clk_disable(struct mtk_drm_crtc * mtk_crtc)207 static void mtk_crtc_ddp_clk_disable(struct mtk_drm_crtc *mtk_crtc)
208 {
209 int i;
210
211 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
212 clk_disable_unprepare(mtk_crtc->ddp_comp[i]->clk);
213 }
214
215 static
mtk_drm_ddp_comp_for_plane(struct drm_crtc * crtc,struct drm_plane * plane,unsigned int * local_layer)216 struct mtk_ddp_comp *mtk_drm_ddp_comp_for_plane(struct drm_crtc *crtc,
217 struct drm_plane *plane,
218 unsigned int *local_layer)
219 {
220 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
221 struct mtk_ddp_comp *comp;
222 int i, count = 0;
223 unsigned int local_index = plane - mtk_crtc->planes;
224
225 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
226 comp = mtk_crtc->ddp_comp[i];
227 if (local_index < (count + mtk_ddp_comp_layer_nr(comp))) {
228 *local_layer = local_index - count;
229 return comp;
230 }
231 count += mtk_ddp_comp_layer_nr(comp);
232 }
233
234 WARN(1, "Failed to find component for plane %d\n", plane->index);
235 return NULL;
236 }
237
238 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
ddp_cmdq_cb(struct cmdq_cb_data data)239 static void ddp_cmdq_cb(struct cmdq_cb_data data)
240 {
241 cmdq_pkt_destroy(data.data);
242 }
243 #endif
244
mtk_crtc_ddp_hw_init(struct mtk_drm_crtc * mtk_crtc)245 static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
246 {
247 struct drm_crtc *crtc = &mtk_crtc->base;
248 struct drm_connector *connector;
249 struct drm_encoder *encoder;
250 struct drm_connector_list_iter conn_iter;
251 unsigned int width, height, vrefresh, bpc = MTK_MAX_BPC;
252 int ret;
253 int i;
254
255 if (WARN_ON(!crtc->state))
256 return -EINVAL;
257
258 width = crtc->state->adjusted_mode.hdisplay;
259 height = crtc->state->adjusted_mode.vdisplay;
260 vrefresh = drm_mode_vrefresh(&crtc->state->adjusted_mode);
261
262 drm_for_each_encoder(encoder, crtc->dev) {
263 if (encoder->crtc != crtc)
264 continue;
265
266 drm_connector_list_iter_begin(crtc->dev, &conn_iter);
267 drm_for_each_connector_iter(connector, &conn_iter) {
268 if (connector->encoder != encoder)
269 continue;
270 if (connector->display_info.bpc != 0 &&
271 bpc > connector->display_info.bpc)
272 bpc = connector->display_info.bpc;
273 }
274 drm_connector_list_iter_end(&conn_iter);
275 }
276
277 ret = pm_runtime_get_sync(crtc->dev->dev);
278 if (ret < 0) {
279 DRM_ERROR("Failed to enable power domain: %d\n", ret);
280 return ret;
281 }
282
283 ret = mtk_disp_mutex_prepare(mtk_crtc->mutex);
284 if (ret < 0) {
285 DRM_ERROR("Failed to enable mutex clock: %d\n", ret);
286 goto err_pm_runtime_put;
287 }
288
289 ret = mtk_crtc_ddp_clk_enable(mtk_crtc);
290 if (ret < 0) {
291 DRM_ERROR("Failed to enable component clocks: %d\n", ret);
292 goto err_mutex_unprepare;
293 }
294
295 for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
296 mtk_mmsys_ddp_connect(mtk_crtc->mmsys_dev,
297 mtk_crtc->ddp_comp[i]->id,
298 mtk_crtc->ddp_comp[i + 1]->id);
299 mtk_disp_mutex_add_comp(mtk_crtc->mutex,
300 mtk_crtc->ddp_comp[i]->id);
301 }
302 mtk_disp_mutex_add_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
303 mtk_disp_mutex_enable(mtk_crtc->mutex);
304
305 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
306 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[i];
307
308 if (i == 1)
309 mtk_ddp_comp_bgclr_in_on(comp);
310
311 mtk_ddp_comp_config(comp, width, height, vrefresh, bpc, NULL);
312 mtk_ddp_comp_start(comp);
313 }
314
315 /* Initially configure all planes */
316 for (i = 0; i < mtk_crtc->layer_nr; i++) {
317 struct drm_plane *plane = &mtk_crtc->planes[i];
318 struct mtk_plane_state *plane_state;
319 struct mtk_ddp_comp *comp;
320 unsigned int local_layer;
321
322 plane_state = to_mtk_plane_state(plane->state);
323 comp = mtk_drm_ddp_comp_for_plane(crtc, plane, &local_layer);
324 if (comp)
325 mtk_ddp_comp_layer_config(comp, local_layer,
326 plane_state, NULL);
327 }
328
329 return 0;
330
331 err_mutex_unprepare:
332 mtk_disp_mutex_unprepare(mtk_crtc->mutex);
333 err_pm_runtime_put:
334 pm_runtime_put(crtc->dev->dev);
335 return ret;
336 }
337
mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc * mtk_crtc)338 static void mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc *mtk_crtc)
339 {
340 struct drm_device *drm = mtk_crtc->base.dev;
341 struct drm_crtc *crtc = &mtk_crtc->base;
342 int i;
343
344 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
345 mtk_ddp_comp_stop(mtk_crtc->ddp_comp[i]);
346 if (i == 1)
347 mtk_ddp_comp_bgclr_in_off(mtk_crtc->ddp_comp[i]);
348 }
349
350 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
351 mtk_disp_mutex_remove_comp(mtk_crtc->mutex,
352 mtk_crtc->ddp_comp[i]->id);
353 mtk_disp_mutex_disable(mtk_crtc->mutex);
354 for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
355 mtk_mmsys_ddp_disconnect(mtk_crtc->mmsys_dev,
356 mtk_crtc->ddp_comp[i]->id,
357 mtk_crtc->ddp_comp[i + 1]->id);
358 mtk_disp_mutex_remove_comp(mtk_crtc->mutex,
359 mtk_crtc->ddp_comp[i]->id);
360 }
361 mtk_disp_mutex_remove_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
362 mtk_crtc_ddp_clk_disable(mtk_crtc);
363 mtk_disp_mutex_unprepare(mtk_crtc->mutex);
364
365 pm_runtime_put(drm->dev);
366
367 if (crtc->state->event && !crtc->state->active) {
368 spin_lock_irq(&crtc->dev->event_lock);
369 drm_crtc_send_vblank_event(crtc, crtc->state->event);
370 crtc->state->event = NULL;
371 spin_unlock_irq(&crtc->dev->event_lock);
372 }
373 }
374
mtk_crtc_ddp_config(struct drm_crtc * crtc,struct cmdq_pkt * cmdq_handle)375 static void mtk_crtc_ddp_config(struct drm_crtc *crtc,
376 struct cmdq_pkt *cmdq_handle)
377 {
378 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
379 struct mtk_crtc_state *state = to_mtk_crtc_state(mtk_crtc->base.state);
380 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
381 unsigned int i;
382 unsigned int local_layer;
383
384 /*
385 * TODO: instead of updating the registers here, we should prepare
386 * working registers in atomic_commit and let the hardware command
387 * queue update module registers on vblank.
388 */
389 if (state->pending_config) {
390 mtk_ddp_comp_config(comp, state->pending_width,
391 state->pending_height,
392 state->pending_vrefresh, 0,
393 cmdq_handle);
394
395 state->pending_config = false;
396 }
397
398 if (mtk_crtc->pending_planes) {
399 for (i = 0; i < mtk_crtc->layer_nr; i++) {
400 struct drm_plane *plane = &mtk_crtc->planes[i];
401 struct mtk_plane_state *plane_state;
402
403 plane_state = to_mtk_plane_state(plane->state);
404
405 if (!plane_state->pending.config)
406 continue;
407
408 comp = mtk_drm_ddp_comp_for_plane(crtc, plane,
409 &local_layer);
410
411 if (comp)
412 mtk_ddp_comp_layer_config(comp, local_layer,
413 plane_state,
414 cmdq_handle);
415 plane_state->pending.config = false;
416 }
417 mtk_crtc->pending_planes = false;
418 }
419
420 if (mtk_crtc->pending_async_planes) {
421 for (i = 0; i < mtk_crtc->layer_nr; i++) {
422 struct drm_plane *plane = &mtk_crtc->planes[i];
423 struct mtk_plane_state *plane_state;
424
425 plane_state = to_mtk_plane_state(plane->state);
426
427 if (!plane_state->pending.async_config)
428 continue;
429
430 comp = mtk_drm_ddp_comp_for_plane(crtc, plane,
431 &local_layer);
432
433 if (comp)
434 mtk_ddp_comp_layer_config(comp, local_layer,
435 plane_state,
436 cmdq_handle);
437 plane_state->pending.async_config = false;
438 }
439 mtk_crtc->pending_async_planes = false;
440 }
441 }
442
mtk_drm_crtc_hw_config(struct mtk_drm_crtc * mtk_crtc)443 static void mtk_drm_crtc_hw_config(struct mtk_drm_crtc *mtk_crtc)
444 {
445 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
446 struct cmdq_pkt *cmdq_handle;
447 #endif
448 struct drm_crtc *crtc = &mtk_crtc->base;
449 struct mtk_drm_private *priv = crtc->dev->dev_private;
450 unsigned int pending_planes = 0, pending_async_planes = 0;
451 int i;
452
453 mutex_lock(&mtk_crtc->hw_lock);
454 for (i = 0; i < mtk_crtc->layer_nr; i++) {
455 struct drm_plane *plane = &mtk_crtc->planes[i];
456 struct mtk_plane_state *plane_state;
457
458 plane_state = to_mtk_plane_state(plane->state);
459 if (plane_state->pending.dirty) {
460 plane_state->pending.config = true;
461 plane_state->pending.dirty = false;
462 pending_planes |= BIT(i);
463 } else if (plane_state->pending.async_dirty) {
464 plane_state->pending.async_config = true;
465 plane_state->pending.async_dirty = false;
466 pending_async_planes |= BIT(i);
467 }
468 }
469 if (pending_planes)
470 mtk_crtc->pending_planes = true;
471 if (pending_async_planes)
472 mtk_crtc->pending_async_planes = true;
473
474 if (priv->data->shadow_register) {
475 mtk_disp_mutex_acquire(mtk_crtc->mutex);
476 mtk_crtc_ddp_config(crtc, NULL);
477 mtk_disp_mutex_release(mtk_crtc->mutex);
478 }
479 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
480 if (mtk_crtc->cmdq_client) {
481 mbox_flush(mtk_crtc->cmdq_client->chan, 2000);
482 cmdq_handle = cmdq_pkt_create(mtk_crtc->cmdq_client, PAGE_SIZE);
483 cmdq_pkt_clear_event(cmdq_handle, mtk_crtc->cmdq_event);
484 cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event, false);
485 mtk_crtc_ddp_config(crtc, cmdq_handle);
486 cmdq_pkt_finalize(cmdq_handle);
487 cmdq_pkt_flush_async(cmdq_handle, ddp_cmdq_cb, cmdq_handle);
488 }
489 #endif
490 mutex_unlock(&mtk_crtc->hw_lock);
491 }
492
mtk_drm_crtc_plane_check(struct drm_crtc * crtc,struct drm_plane * plane,struct mtk_plane_state * state)493 int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct drm_plane *plane,
494 struct mtk_plane_state *state)
495 {
496 unsigned int local_layer;
497 struct mtk_ddp_comp *comp;
498
499 comp = mtk_drm_ddp_comp_for_plane(crtc, plane, &local_layer);
500 if (comp)
501 return mtk_ddp_comp_layer_check(comp, local_layer, state);
502 return 0;
503 }
504
mtk_drm_crtc_async_update(struct drm_crtc * crtc,struct drm_plane * plane,struct drm_plane_state * new_state)505 void mtk_drm_crtc_async_update(struct drm_crtc *crtc, struct drm_plane *plane,
506 struct drm_plane_state *new_state)
507 {
508 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
509 const struct drm_plane_helper_funcs *plane_helper_funcs =
510 plane->helper_private;
511
512 if (!mtk_crtc->enabled)
513 return;
514
515 plane_helper_funcs->atomic_update(plane, new_state);
516 mtk_drm_crtc_hw_config(mtk_crtc);
517 }
518
mtk_drm_crtc_atomic_enable(struct drm_crtc * crtc,struct drm_crtc_state * old_state)519 static void mtk_drm_crtc_atomic_enable(struct drm_crtc *crtc,
520 struct drm_crtc_state *old_state)
521 {
522 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
523 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
524 int ret;
525
526 DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
527
528 ret = mtk_smi_larb_get(comp->larb_dev);
529 if (ret) {
530 DRM_ERROR("Failed to get larb: %d\n", ret);
531 return;
532 }
533
534 ret = mtk_crtc_ddp_hw_init(mtk_crtc);
535 if (ret) {
536 mtk_smi_larb_put(comp->larb_dev);
537 return;
538 }
539
540 drm_crtc_vblank_on(crtc);
541 mtk_crtc->enabled = true;
542 }
543
mtk_drm_crtc_atomic_disable(struct drm_crtc * crtc,struct drm_crtc_state * old_state)544 static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc,
545 struct drm_crtc_state *old_state)
546 {
547 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
548 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
549 int i;
550
551 DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
552 if (!mtk_crtc->enabled)
553 return;
554
555 /* Set all pending plane state to disabled */
556 for (i = 0; i < mtk_crtc->layer_nr; i++) {
557 struct drm_plane *plane = &mtk_crtc->planes[i];
558 struct mtk_plane_state *plane_state;
559
560 plane_state = to_mtk_plane_state(plane->state);
561 plane_state->pending.enable = false;
562 plane_state->pending.config = true;
563 }
564 mtk_crtc->pending_planes = true;
565
566 mtk_drm_crtc_hw_config(mtk_crtc);
567 /* Wait for planes to be disabled */
568 drm_crtc_wait_one_vblank(crtc);
569
570 drm_crtc_vblank_off(crtc);
571 mtk_crtc_ddp_hw_fini(mtk_crtc);
572 mtk_smi_larb_put(comp->larb_dev);
573
574 mtk_crtc->enabled = false;
575 }
576
mtk_drm_crtc_atomic_begin(struct drm_crtc * crtc,struct drm_crtc_state * old_crtc_state)577 static void mtk_drm_crtc_atomic_begin(struct drm_crtc *crtc,
578 struct drm_crtc_state *old_crtc_state)
579 {
580 struct mtk_crtc_state *state = to_mtk_crtc_state(crtc->state);
581 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
582
583 if (mtk_crtc->event && state->base.event)
584 DRM_ERROR("new event while there is still a pending event\n");
585
586 if (state->base.event) {
587 state->base.event->pipe = drm_crtc_index(crtc);
588 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
589 mtk_crtc->event = state->base.event;
590 state->base.event = NULL;
591 }
592 }
593
mtk_drm_crtc_atomic_flush(struct drm_crtc * crtc,struct drm_crtc_state * old_crtc_state)594 static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
595 struct drm_crtc_state *old_crtc_state)
596 {
597 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
598 int i;
599
600 if (mtk_crtc->event)
601 mtk_crtc->pending_needs_vblank = true;
602 if (crtc->state->color_mgmt_changed)
603 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
604 mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i], crtc->state);
605 mtk_ddp_ctm_set(mtk_crtc->ddp_comp[i], crtc->state);
606 }
607 mtk_drm_crtc_hw_config(mtk_crtc);
608 }
609
610 static const struct drm_crtc_funcs mtk_crtc_funcs = {
611 .set_config = drm_atomic_helper_set_config,
612 .page_flip = drm_atomic_helper_page_flip,
613 .destroy = mtk_drm_crtc_destroy,
614 .reset = mtk_drm_crtc_reset,
615 .atomic_duplicate_state = mtk_drm_crtc_duplicate_state,
616 .atomic_destroy_state = mtk_drm_crtc_destroy_state,
617 .gamma_set = drm_atomic_helper_legacy_gamma_set,
618 .enable_vblank = mtk_drm_crtc_enable_vblank,
619 .disable_vblank = mtk_drm_crtc_disable_vblank,
620 };
621
622 static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
623 .mode_fixup = mtk_drm_crtc_mode_fixup,
624 .mode_set_nofb = mtk_drm_crtc_mode_set_nofb,
625 .atomic_begin = mtk_drm_crtc_atomic_begin,
626 .atomic_flush = mtk_drm_crtc_atomic_flush,
627 .atomic_enable = mtk_drm_crtc_atomic_enable,
628 .atomic_disable = mtk_drm_crtc_atomic_disable,
629 };
630
mtk_drm_crtc_init(struct drm_device * drm,struct mtk_drm_crtc * mtk_crtc,unsigned int pipe)631 static int mtk_drm_crtc_init(struct drm_device *drm,
632 struct mtk_drm_crtc *mtk_crtc,
633 unsigned int pipe)
634 {
635 struct drm_plane *primary = NULL;
636 struct drm_plane *cursor = NULL;
637 int i, ret;
638
639 for (i = 0; i < mtk_crtc->layer_nr; i++) {
640 if (mtk_crtc->planes[i].type == DRM_PLANE_TYPE_PRIMARY)
641 primary = &mtk_crtc->planes[i];
642 else if (mtk_crtc->planes[i].type == DRM_PLANE_TYPE_CURSOR)
643 cursor = &mtk_crtc->planes[i];
644 }
645
646 ret = drm_crtc_init_with_planes(drm, &mtk_crtc->base, primary, cursor,
647 &mtk_crtc_funcs, NULL);
648 if (ret)
649 goto err_cleanup_crtc;
650
651 drm_crtc_helper_add(&mtk_crtc->base, &mtk_crtc_helper_funcs);
652
653 return 0;
654
655 err_cleanup_crtc:
656 drm_crtc_cleanup(&mtk_crtc->base);
657 return ret;
658 }
659
mtk_crtc_ddp_irq(struct drm_crtc * crtc,struct mtk_ddp_comp * comp)660 void mtk_crtc_ddp_irq(struct drm_crtc *crtc, struct mtk_ddp_comp *comp)
661 {
662 struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
663 struct mtk_drm_private *priv = crtc->dev->dev_private;
664
665 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
666 if (!priv->data->shadow_register && !mtk_crtc->cmdq_client)
667 #else
668 if (!priv->data->shadow_register)
669 #endif
670 mtk_crtc_ddp_config(crtc, NULL);
671
672 mtk_drm_finish_page_flip(mtk_crtc);
673 }
674
mtk_drm_crtc_num_comp_planes(struct mtk_drm_crtc * mtk_crtc,int comp_idx)675 static int mtk_drm_crtc_num_comp_planes(struct mtk_drm_crtc *mtk_crtc,
676 int comp_idx)
677 {
678 struct mtk_ddp_comp *comp;
679
680 if (comp_idx > 1)
681 return 0;
682
683 comp = mtk_crtc->ddp_comp[comp_idx];
684 if (!comp->funcs)
685 return 0;
686
687 if (comp_idx == 1 && !comp->funcs->bgclr_in_on)
688 return 0;
689
690 return mtk_ddp_comp_layer_nr(comp);
691 }
692
693 static inline
mtk_drm_crtc_plane_type(unsigned int plane_idx,unsigned int num_planes)694 enum drm_plane_type mtk_drm_crtc_plane_type(unsigned int plane_idx,
695 unsigned int num_planes)
696 {
697 if (plane_idx == 0)
698 return DRM_PLANE_TYPE_PRIMARY;
699 else if (plane_idx == (num_planes - 1))
700 return DRM_PLANE_TYPE_CURSOR;
701 else
702 return DRM_PLANE_TYPE_OVERLAY;
703
704 }
705
mtk_drm_crtc_init_comp_planes(struct drm_device * drm_dev,struct mtk_drm_crtc * mtk_crtc,int comp_idx,int pipe)706 static int mtk_drm_crtc_init_comp_planes(struct drm_device *drm_dev,
707 struct mtk_drm_crtc *mtk_crtc,
708 int comp_idx, int pipe)
709 {
710 int num_planes = mtk_drm_crtc_num_comp_planes(mtk_crtc, comp_idx);
711 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[comp_idx];
712 int i, ret;
713
714 for (i = 0; i < num_planes; i++) {
715 ret = mtk_plane_init(drm_dev,
716 &mtk_crtc->planes[mtk_crtc->layer_nr],
717 BIT(pipe),
718 mtk_drm_crtc_plane_type(mtk_crtc->layer_nr,
719 num_planes),
720 mtk_ddp_comp_supported_rotations(comp));
721 if (ret)
722 return ret;
723
724 mtk_crtc->layer_nr++;
725 }
726 return 0;
727 }
728
mtk_drm_crtc_create(struct drm_device * drm_dev,const enum mtk_ddp_comp_id * path,unsigned int path_len)729 int mtk_drm_crtc_create(struct drm_device *drm_dev,
730 const enum mtk_ddp_comp_id *path, unsigned int path_len)
731 {
732 struct mtk_drm_private *priv = drm_dev->dev_private;
733 struct device *dev = drm_dev->dev;
734 struct mtk_drm_crtc *mtk_crtc;
735 unsigned int num_comp_planes = 0;
736 int pipe = priv->num_pipes;
737 int ret;
738 int i;
739 bool has_ctm = false;
740 uint gamma_lut_size = 0;
741
742 if (!path)
743 return 0;
744
745 for (i = 0; i < path_len; i++) {
746 enum mtk_ddp_comp_id comp_id = path[i];
747 struct device_node *node;
748
749 node = priv->comp_node[comp_id];
750 if (!node) {
751 dev_info(dev,
752 "Not creating crtc %d because component %d is disabled or missing\n",
753 pipe, comp_id);
754 return 0;
755 }
756 }
757
758 mtk_crtc = devm_kzalloc(dev, sizeof(*mtk_crtc), GFP_KERNEL);
759 if (!mtk_crtc)
760 return -ENOMEM;
761
762 mtk_crtc->mmsys_dev = priv->mmsys_dev;
763 mtk_crtc->ddp_comp_nr = path_len;
764 mtk_crtc->ddp_comp = devm_kmalloc_array(dev, mtk_crtc->ddp_comp_nr,
765 sizeof(*mtk_crtc->ddp_comp),
766 GFP_KERNEL);
767 if (!mtk_crtc->ddp_comp)
768 return -ENOMEM;
769
770 mtk_crtc->mutex = mtk_disp_mutex_get(priv->mutex_dev, pipe);
771 if (IS_ERR(mtk_crtc->mutex)) {
772 ret = PTR_ERR(mtk_crtc->mutex);
773 dev_err(dev, "Failed to get mutex: %d\n", ret);
774 return ret;
775 }
776
777 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
778 enum mtk_ddp_comp_id comp_id = path[i];
779 struct mtk_ddp_comp *comp;
780 struct device_node *node;
781
782 node = priv->comp_node[comp_id];
783 comp = priv->ddp_comp[comp_id];
784 if (!comp) {
785 dev_err(dev, "Component %pOF not initialized\n", node);
786 ret = -ENODEV;
787 return ret;
788 }
789
790 mtk_crtc->ddp_comp[i] = comp;
791
792 if (comp->funcs) {
793 if (comp->funcs->gamma_set)
794 gamma_lut_size = MTK_LUT_SIZE;
795
796 if (comp->funcs->ctm_set)
797 has_ctm = true;
798 }
799 }
800
801 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
802 num_comp_planes += mtk_drm_crtc_num_comp_planes(mtk_crtc, i);
803
804 mtk_crtc->planes = devm_kcalloc(dev, num_comp_planes,
805 sizeof(struct drm_plane), GFP_KERNEL);
806
807 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
808 ret = mtk_drm_crtc_init_comp_planes(drm_dev, mtk_crtc, i,
809 pipe);
810 if (ret)
811 return ret;
812 }
813
814 ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, pipe);
815 if (ret < 0)
816 return ret;
817
818 if (gamma_lut_size)
819 drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size);
820 drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, has_ctm, gamma_lut_size);
821 priv->num_pipes++;
822 mutex_init(&mtk_crtc->hw_lock);
823
824 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
825 mtk_crtc->cmdq_client =
826 cmdq_mbox_create(mtk_crtc->mmsys_dev,
827 drm_crtc_index(&mtk_crtc->base),
828 2000);
829 if (IS_ERR(mtk_crtc->cmdq_client)) {
830 dev_dbg(dev, "mtk_crtc %d failed to create mailbox client, writing register by CPU now\n",
831 drm_crtc_index(&mtk_crtc->base));
832 mtk_crtc->cmdq_client = NULL;
833 }
834
835 if (mtk_crtc->cmdq_client) {
836 ret = of_property_read_u32_index(priv->mutex_node,
837 "mediatek,gce-events",
838 drm_crtc_index(&mtk_crtc->base),
839 &mtk_crtc->cmdq_event);
840 if (ret) {
841 dev_dbg(dev, "mtk_crtc %d failed to get mediatek,gce-events property\n",
842 drm_crtc_index(&mtk_crtc->base));
843 cmdq_mbox_destroy(mtk_crtc->cmdq_client);
844 mtk_crtc->cmdq_client = NULL;
845 }
846 }
847 #endif
848 return 0;
849 }
850
