Linux Audio

Check our new training course

Loading...
v5.4
  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}
v6.2
   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/pm_runtime.h>
  10#include <linux/soc/mediatek/mtk-cmdq.h>
  11#include <linux/soc/mediatek/mtk-mmsys.h>
  12#include <linux/soc/mediatek/mtk-mutex.h>
  13
  14#include <asm/barrier.h>
 
  15
  16#include <drm/drm_atomic.h>
  17#include <drm/drm_atomic_helper.h>
 
  18#include <drm/drm_probe_helper.h>
  19#include <drm/drm_vblank.h>
  20
  21#include "mtk_drm_drv.h"
  22#include "mtk_drm_crtc.h"
 
  23#include "mtk_drm_ddp_comp.h"
  24#include "mtk_drm_gem.h"
  25#include "mtk_drm_plane.h"
  26
  27/*
  28 * struct mtk_drm_crtc - MediaTek specific crtc structure.
  29 * @base: crtc object.
  30 * @enabled: records whether crtc_enable succeeded
  31 * @planes: array of 4 drm_plane structures, one for each overlay plane
  32 * @pending_planes: whether any plane has pending changes to be applied
  33 * @mmsys_dev: pointer to the mmsys device for configuration registers
  34 * @mutex: handle to one of the ten disp_mutex streams
  35 * @ddp_comp_nr: number of components in ddp_comp
  36 * @ddp_comp: array of pointers the mtk_ddp_comp structures used by this crtc
  37 *
  38 * TODO: Needs update: this header is missing a bunch of member descriptions.
  39 */
  40struct mtk_drm_crtc {
  41	struct drm_crtc			base;
  42	bool				enabled;
  43
  44	bool				pending_needs_vblank;
  45	struct drm_pending_vblank_event	*event;
  46
  47	struct drm_plane		*planes;
  48	unsigned int			layer_nr;
  49	bool				pending_planes;
  50	bool				pending_async_planes;
  51
  52#if IS_REACHABLE(CONFIG_MTK_CMDQ)
  53	struct cmdq_client		cmdq_client;
  54	struct cmdq_pkt			cmdq_handle;
  55	u32				cmdq_event;
  56	u32				cmdq_vblank_cnt;
  57	wait_queue_head_t		cb_blocking_queue;
  58#endif
  59
  60	struct device			*mmsys_dev;
  61	struct mtk_mutex		*mutex;
  62	unsigned int			ddp_comp_nr;
  63	struct mtk_ddp_comp		**ddp_comp;
  64
  65	/* lock for display hardware access */
  66	struct mutex			hw_lock;
  67	bool				config_updating;
  68};
  69
  70struct mtk_crtc_state {
  71	struct drm_crtc_state		base;
  72
  73	bool				pending_config;
  74	unsigned int			pending_width;
  75	unsigned int			pending_height;
  76	unsigned int			pending_vrefresh;
  77};
  78
  79static inline struct mtk_drm_crtc *to_mtk_crtc(struct drm_crtc *c)
  80{
  81	return container_of(c, struct mtk_drm_crtc, base);
  82}
  83
  84static inline struct mtk_crtc_state *to_mtk_crtc_state(struct drm_crtc_state *s)
  85{
  86	return container_of(s, struct mtk_crtc_state, base);
  87}
  88
  89static void mtk_drm_crtc_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
  90{
  91	struct drm_crtc *crtc = &mtk_crtc->base;
  92	unsigned long flags;
  93
  94	spin_lock_irqsave(&crtc->dev->event_lock, flags);
  95	drm_crtc_send_vblank_event(crtc, mtk_crtc->event);
  96	drm_crtc_vblank_put(crtc);
  97	mtk_crtc->event = NULL;
  98	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
  99}
 100
 101static void mtk_drm_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
 102{
 103	drm_crtc_handle_vblank(&mtk_crtc->base);
 104	if (!mtk_crtc->config_updating && mtk_crtc->pending_needs_vblank) {
 105		mtk_drm_crtc_finish_page_flip(mtk_crtc);
 106		mtk_crtc->pending_needs_vblank = false;
 107	}
 108}
 109
 110#if IS_REACHABLE(CONFIG_MTK_CMDQ)
 111static int mtk_drm_cmdq_pkt_create(struct cmdq_client *client, struct cmdq_pkt *pkt,
 112				   size_t size)
 113{
 114	struct device *dev;
 115	dma_addr_t dma_addr;
 116
 117	pkt->va_base = kzalloc(size, GFP_KERNEL);
 118	if (!pkt->va_base) {
 119		kfree(pkt);
 120		return -ENOMEM;
 121	}
 122	pkt->buf_size = size;
 123	pkt->cl = (void *)client;
 124
 125	dev = client->chan->mbox->dev;
 126	dma_addr = dma_map_single(dev, pkt->va_base, pkt->buf_size,
 127				  DMA_TO_DEVICE);
 128	if (dma_mapping_error(dev, dma_addr)) {
 129		dev_err(dev, "dma map failed, size=%u\n", (u32)(u64)size);
 130		kfree(pkt->va_base);
 131		kfree(pkt);
 132		return -ENOMEM;
 133	}
 134
 135	pkt->pa_base = dma_addr;
 136
 137	return 0;
 138}
 139
 140static void mtk_drm_cmdq_pkt_destroy(struct cmdq_pkt *pkt)
 141{
 142	struct cmdq_client *client = (struct cmdq_client *)pkt->cl;
 143
 144	dma_unmap_single(client->chan->mbox->dev, pkt->pa_base, pkt->buf_size,
 145			 DMA_TO_DEVICE);
 146	kfree(pkt->va_base);
 147	kfree(pkt);
 148}
 149#endif
 150
 151static void mtk_drm_crtc_destroy(struct drm_crtc *crtc)
 152{
 153	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 154	int i;
 155
 156	mtk_mutex_put(mtk_crtc->mutex);
 157#if IS_REACHABLE(CONFIG_MTK_CMDQ)
 158	mtk_drm_cmdq_pkt_destroy(&mtk_crtc->cmdq_handle);
 159
 160	if (mtk_crtc->cmdq_client.chan) {
 161		mbox_free_channel(mtk_crtc->cmdq_client.chan);
 162		mtk_crtc->cmdq_client.chan = NULL;
 163	}
 164#endif
 165
 166	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 167		struct mtk_ddp_comp *comp;
 168
 169		comp = mtk_crtc->ddp_comp[i];
 170		mtk_ddp_comp_unregister_vblank_cb(comp);
 171	}
 172
 173	drm_crtc_cleanup(crtc);
 174}
 175
 176static void mtk_drm_crtc_reset(struct drm_crtc *crtc)
 177{
 178	struct mtk_crtc_state *state;
 179
 180	if (crtc->state)
 181		__drm_atomic_helper_crtc_destroy_state(crtc->state);
 182
 183	kfree(to_mtk_crtc_state(crtc->state));
 184	crtc->state = NULL;
 
 
 
 
 
 
 185
 186	state = kzalloc(sizeof(*state), GFP_KERNEL);
 187	if (state)
 188		__drm_atomic_helper_crtc_reset(crtc, &state->base);
 189}
 190
 191static struct drm_crtc_state *mtk_drm_crtc_duplicate_state(struct drm_crtc *crtc)
 192{
 193	struct mtk_crtc_state *state;
 194
 195	state = kmalloc(sizeof(*state), GFP_KERNEL);
 196	if (!state)
 197		return NULL;
 198
 199	__drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
 200
 201	WARN_ON(state->base.crtc != crtc);
 202	state->base.crtc = crtc;
 203	state->pending_config = false;
 204
 205	return &state->base;
 206}
 207
 208static void mtk_drm_crtc_destroy_state(struct drm_crtc *crtc,
 209				       struct drm_crtc_state *state)
 210{
 211	__drm_atomic_helper_crtc_destroy_state(state);
 212	kfree(to_mtk_crtc_state(state));
 213}
 214
 215static bool mtk_drm_crtc_mode_fixup(struct drm_crtc *crtc,
 216				    const struct drm_display_mode *mode,
 217				    struct drm_display_mode *adjusted_mode)
 218{
 219	/* Nothing to do here, but this callback is mandatory. */
 220	return true;
 221}
 222
 223static void mtk_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
 224{
 225	struct mtk_crtc_state *state = to_mtk_crtc_state(crtc->state);
 226
 227	state->pending_width = crtc->mode.hdisplay;
 228	state->pending_height = crtc->mode.vdisplay;
 229	state->pending_vrefresh = drm_mode_vrefresh(&crtc->mode);
 230	wmb();	/* Make sure the above parameters are set before update */
 231	state->pending_config = true;
 232}
 233
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 234static int mtk_crtc_ddp_clk_enable(struct mtk_drm_crtc *mtk_crtc)
 235{
 236	int ret;
 237	int i;
 238
 
 239	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 240		ret = mtk_ddp_comp_clk_enable(mtk_crtc->ddp_comp[i]);
 241		if (ret) {
 242			DRM_ERROR("Failed to enable clock %d: %d\n", i, ret);
 243			goto err;
 244		}
 245	}
 246
 247	return 0;
 248err:
 249	while (--i >= 0)
 250		mtk_ddp_comp_clk_disable(mtk_crtc->ddp_comp[i]);
 251	return ret;
 252}
 253
 254static void mtk_crtc_ddp_clk_disable(struct mtk_drm_crtc *mtk_crtc)
 255{
 256	int i;
 257
 
 258	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
 259		mtk_ddp_comp_clk_disable(mtk_crtc->ddp_comp[i]);
 260}
 261
 262static
 263struct mtk_ddp_comp *mtk_drm_ddp_comp_for_plane(struct drm_crtc *crtc,
 264						struct drm_plane *plane,
 265						unsigned int *local_layer)
 266{
 267	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 268	struct mtk_ddp_comp *comp;
 269	int i, count = 0;
 270	unsigned int local_index = plane - mtk_crtc->planes;
 271
 272	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 273		comp = mtk_crtc->ddp_comp[i];
 274		if (local_index < (count + mtk_ddp_comp_layer_nr(comp))) {
 275			*local_layer = local_index - count;
 276			return comp;
 277		}
 278		count += mtk_ddp_comp_layer_nr(comp);
 279	}
 280
 281	WARN(1, "Failed to find component for plane %d\n", plane->index);
 282	return NULL;
 283}
 284
 285#if IS_REACHABLE(CONFIG_MTK_CMDQ)
 286static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg)
 287{
 288	struct cmdq_cb_data *data = mssg;
 289	struct cmdq_client *cmdq_cl = container_of(cl, struct cmdq_client, client);
 290	struct mtk_drm_crtc *mtk_crtc = container_of(cmdq_cl, struct mtk_drm_crtc, cmdq_client);
 291	struct mtk_crtc_state *state;
 292	unsigned int i;
 293
 294	if (data->sta < 0)
 295		return;
 296
 297	state = to_mtk_crtc_state(mtk_crtc->base.state);
 298
 299	state->pending_config = false;
 300
 301	if (mtk_crtc->pending_planes) {
 302		for (i = 0; i < mtk_crtc->layer_nr; i++) {
 303			struct drm_plane *plane = &mtk_crtc->planes[i];
 304			struct mtk_plane_state *plane_state;
 305
 306			plane_state = to_mtk_plane_state(plane->state);
 307
 308			plane_state->pending.config = false;
 309		}
 310		mtk_crtc->pending_planes = false;
 311	}
 312
 313	if (mtk_crtc->pending_async_planes) {
 314		for (i = 0; i < mtk_crtc->layer_nr; i++) {
 315			struct drm_plane *plane = &mtk_crtc->planes[i];
 316			struct mtk_plane_state *plane_state;
 317
 318			plane_state = to_mtk_plane_state(plane->state);
 319
 320			plane_state->pending.async_config = false;
 321		}
 322		mtk_crtc->pending_async_planes = false;
 323	}
 324
 325	mtk_crtc->cmdq_vblank_cnt = 0;
 326	wake_up(&mtk_crtc->cb_blocking_queue);
 327}
 328#endif
 329
 330static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
 331{
 332	struct drm_crtc *crtc = &mtk_crtc->base;
 333	struct drm_connector *connector;
 334	struct drm_encoder *encoder;
 335	struct drm_connector_list_iter conn_iter;
 336	unsigned int width, height, vrefresh, bpc = MTK_MAX_BPC;
 337	int ret;
 338	int i;
 339
 
 340	if (WARN_ON(!crtc->state))
 341		return -EINVAL;
 342
 343	width = crtc->state->adjusted_mode.hdisplay;
 344	height = crtc->state->adjusted_mode.vdisplay;
 345	vrefresh = drm_mode_vrefresh(&crtc->state->adjusted_mode);
 346
 347	drm_for_each_encoder(encoder, crtc->dev) {
 348		if (encoder->crtc != crtc)
 349			continue;
 350
 351		drm_connector_list_iter_begin(crtc->dev, &conn_iter);
 352		drm_for_each_connector_iter(connector, &conn_iter) {
 353			if (connector->encoder != encoder)
 354				continue;
 355			if (connector->display_info.bpc != 0 &&
 356			    bpc > connector->display_info.bpc)
 357				bpc = connector->display_info.bpc;
 358		}
 359		drm_connector_list_iter_end(&conn_iter);
 360	}
 361
 362	ret = pm_runtime_resume_and_get(crtc->dev->dev);
 363	if (ret < 0) {
 364		DRM_ERROR("Failed to enable power domain: %d\n", ret);
 365		return ret;
 366	}
 367
 368	ret = mtk_mutex_prepare(mtk_crtc->mutex);
 369	if (ret < 0) {
 370		DRM_ERROR("Failed to enable mutex clock: %d\n", ret);
 371		goto err_pm_runtime_put;
 372	}
 373
 374	ret = mtk_crtc_ddp_clk_enable(mtk_crtc);
 375	if (ret < 0) {
 376		DRM_ERROR("Failed to enable component clocks: %d\n", ret);
 377		goto err_mutex_unprepare;
 378	}
 379
 
 380	for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
 381		mtk_mmsys_ddp_connect(mtk_crtc->mmsys_dev,
 382				      mtk_crtc->ddp_comp[i]->id,
 383				      mtk_crtc->ddp_comp[i + 1]->id);
 384		mtk_mutex_add_comp(mtk_crtc->mutex,
 385					mtk_crtc->ddp_comp[i]->id);
 386	}
 387	mtk_mutex_add_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
 388	mtk_mutex_enable(mtk_crtc->mutex);
 389
 390	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 391		struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[i];
 392
 393		if (i == 1)
 394			mtk_ddp_comp_bgclr_in_on(comp);
 395
 396		mtk_ddp_comp_config(comp, width, height, vrefresh, bpc, NULL);
 397		mtk_ddp_comp_start(comp);
 398	}
 399
 400	/* Initially configure all planes */
 401	for (i = 0; i < mtk_crtc->layer_nr; i++) {
 402		struct drm_plane *plane = &mtk_crtc->planes[i];
 403		struct mtk_plane_state *plane_state;
 404		struct mtk_ddp_comp *comp;
 405		unsigned int local_layer;
 406
 407		plane_state = to_mtk_plane_state(plane->state);
 408		comp = mtk_drm_ddp_comp_for_plane(crtc, plane, &local_layer);
 409		if (comp)
 410			mtk_ddp_comp_layer_config(comp, local_layer,
 411						  plane_state, NULL);
 412	}
 413
 414	return 0;
 415
 416err_mutex_unprepare:
 417	mtk_mutex_unprepare(mtk_crtc->mutex);
 418err_pm_runtime_put:
 419	pm_runtime_put(crtc->dev->dev);
 420	return ret;
 421}
 422
 423static void mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc *mtk_crtc)
 424{
 425	struct drm_device *drm = mtk_crtc->base.dev;
 426	struct drm_crtc *crtc = &mtk_crtc->base;
 427	int i;
 428
 429	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 
 430		mtk_ddp_comp_stop(mtk_crtc->ddp_comp[i]);
 431		if (i == 1)
 432			mtk_ddp_comp_bgclr_in_off(mtk_crtc->ddp_comp[i]);
 433	}
 434
 435	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
 436		mtk_mutex_remove_comp(mtk_crtc->mutex,
 437					   mtk_crtc->ddp_comp[i]->id);
 438	mtk_mutex_disable(mtk_crtc->mutex);
 439	for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
 440		mtk_mmsys_ddp_disconnect(mtk_crtc->mmsys_dev,
 441					 mtk_crtc->ddp_comp[i]->id,
 442					 mtk_crtc->ddp_comp[i + 1]->id);
 443		mtk_mutex_remove_comp(mtk_crtc->mutex,
 444					   mtk_crtc->ddp_comp[i]->id);
 445	}
 446	mtk_mutex_remove_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
 447	mtk_crtc_ddp_clk_disable(mtk_crtc);
 448	mtk_mutex_unprepare(mtk_crtc->mutex);
 449
 450	pm_runtime_put(drm->dev);
 451
 452	if (crtc->state->event && !crtc->state->active) {
 453		spin_lock_irq(&crtc->dev->event_lock);
 454		drm_crtc_send_vblank_event(crtc, crtc->state->event);
 455		crtc->state->event = NULL;
 456		spin_unlock_irq(&crtc->dev->event_lock);
 457	}
 458}
 459
 460static void mtk_crtc_ddp_config(struct drm_crtc *crtc,
 461				struct cmdq_pkt *cmdq_handle)
 462{
 463	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 464	struct mtk_crtc_state *state = to_mtk_crtc_state(mtk_crtc->base.state);
 465	struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
 466	unsigned int i;
 467	unsigned int local_layer;
 468
 469	/*
 470	 * TODO: instead of updating the registers here, we should prepare
 471	 * working registers in atomic_commit and let the hardware command
 472	 * queue update module registers on vblank.
 473	 */
 474	if (state->pending_config) {
 475		mtk_ddp_comp_config(comp, state->pending_width,
 476				    state->pending_height,
 477				    state->pending_vrefresh, 0,
 478				    cmdq_handle);
 479
 480		if (!cmdq_handle)
 481			state->pending_config = false;
 482	}
 483
 484	if (mtk_crtc->pending_planes) {
 485		for (i = 0; i < mtk_crtc->layer_nr; i++) {
 486			struct drm_plane *plane = &mtk_crtc->planes[i];
 487			struct mtk_plane_state *plane_state;
 488
 489			plane_state = to_mtk_plane_state(plane->state);
 490
 491			if (!plane_state->pending.config)
 492				continue;
 493
 494			comp = mtk_drm_ddp_comp_for_plane(crtc, plane,
 495							  &local_layer);
 496
 497			if (comp)
 498				mtk_ddp_comp_layer_config(comp, local_layer,
 499							  plane_state,
 500							  cmdq_handle);
 501			if (!cmdq_handle)
 502				plane_state->pending.config = false;
 
 503		}
 504
 505		if (!cmdq_handle)
 506			mtk_crtc->pending_planes = false;
 507	}
 508
 509	if (mtk_crtc->pending_async_planes) {
 510		for (i = 0; i < mtk_crtc->layer_nr; i++) {
 511			struct drm_plane *plane = &mtk_crtc->planes[i];
 512			struct mtk_plane_state *plane_state;
 513
 514			plane_state = to_mtk_plane_state(plane->state);
 515
 516			if (!plane_state->pending.async_config)
 517				continue;
 518
 519			comp = mtk_drm_ddp_comp_for_plane(crtc, plane,
 520							  &local_layer);
 521
 522			if (comp)
 523				mtk_ddp_comp_layer_config(comp, local_layer,
 524							  plane_state,
 525							  cmdq_handle);
 526			if (!cmdq_handle)
 527				plane_state->pending.async_config = false;
 528		}
 529
 530		if (!cmdq_handle)
 531			mtk_crtc->pending_async_planes = false;
 532	}
 533}
 534
 535static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc,
 536				       bool needs_vblank)
 537{
 538#if IS_REACHABLE(CONFIG_MTK_CMDQ)
 539	struct cmdq_pkt *cmdq_handle = &mtk_crtc->cmdq_handle;
 540#endif
 541	struct drm_crtc *crtc = &mtk_crtc->base;
 542	struct mtk_drm_private *priv = crtc->dev->dev_private;
 543	unsigned int pending_planes = 0, pending_async_planes = 0;
 544	int i;
 545
 546	mutex_lock(&mtk_crtc->hw_lock);
 547	mtk_crtc->config_updating = true;
 548	if (needs_vblank)
 549		mtk_crtc->pending_needs_vblank = true;
 550
 551	for (i = 0; i < mtk_crtc->layer_nr; i++) {
 552		struct drm_plane *plane = &mtk_crtc->planes[i];
 553		struct mtk_plane_state *plane_state;
 554
 555		plane_state = to_mtk_plane_state(plane->state);
 556		if (plane_state->pending.dirty) {
 557			plane_state->pending.config = true;
 558			plane_state->pending.dirty = false;
 559			pending_planes |= BIT(i);
 560		} else if (plane_state->pending.async_dirty) {
 561			plane_state->pending.async_config = true;
 562			plane_state->pending.async_dirty = false;
 563			pending_async_planes |= BIT(i);
 564		}
 565	}
 566	if (pending_planes)
 567		mtk_crtc->pending_planes = true;
 568	if (pending_async_planes)
 569		mtk_crtc->pending_async_planes = true;
 570
 571	if (priv->data->shadow_register) {
 572		mtk_mutex_acquire(mtk_crtc->mutex);
 573		mtk_crtc_ddp_config(crtc, NULL);
 574		mtk_mutex_release(mtk_crtc->mutex);
 575	}
 576#if IS_REACHABLE(CONFIG_MTK_CMDQ)
 577	if (mtk_crtc->cmdq_client.chan) {
 578		mbox_flush(mtk_crtc->cmdq_client.chan, 2000);
 579		cmdq_handle->cmd_buf_size = 0;
 580		cmdq_pkt_clear_event(cmdq_handle, mtk_crtc->cmdq_event);
 581		cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event, false);
 582		mtk_crtc_ddp_config(crtc, cmdq_handle);
 583		cmdq_pkt_finalize(cmdq_handle);
 584		dma_sync_single_for_device(mtk_crtc->cmdq_client.chan->mbox->dev,
 585					   cmdq_handle->pa_base,
 586					   cmdq_handle->cmd_buf_size,
 587					   DMA_TO_DEVICE);
 588		/*
 589		 * CMDQ command should execute in next 3 vblank.
 590		 * One vblank interrupt before send message (occasionally)
 591		 * and one vblank interrupt after cmdq done,
 592		 * so it's timeout after 3 vblank interrupt.
 593		 * If it fail to execute in next 3 vblank, timeout happen.
 594		 */
 595		mtk_crtc->cmdq_vblank_cnt = 3;
 596
 597		mbox_send_message(mtk_crtc->cmdq_client.chan, cmdq_handle);
 598		mbox_client_txdone(mtk_crtc->cmdq_client.chan, 0);
 599	}
 600#endif
 601	mtk_crtc->config_updating = false;
 602	mutex_unlock(&mtk_crtc->hw_lock);
 603}
 604
 605static void mtk_crtc_ddp_irq(void *data)
 606{
 607	struct drm_crtc *crtc = data;
 608	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 609	struct mtk_drm_private *priv = crtc->dev->dev_private;
 610
 611#if IS_REACHABLE(CONFIG_MTK_CMDQ)
 612	if (!priv->data->shadow_register && !mtk_crtc->cmdq_client.chan)
 613		mtk_crtc_ddp_config(crtc, NULL);
 614	else if (mtk_crtc->cmdq_vblank_cnt > 0 && --mtk_crtc->cmdq_vblank_cnt == 0)
 615		DRM_ERROR("mtk_crtc %d CMDQ execute command timeout!\n",
 616			  drm_crtc_index(&mtk_crtc->base));
 617#else
 618	if (!priv->data->shadow_register)
 619		mtk_crtc_ddp_config(crtc, NULL);
 620#endif
 621	mtk_drm_finish_page_flip(mtk_crtc);
 622}
 623
 624static int mtk_drm_crtc_enable_vblank(struct drm_crtc *crtc)
 625{
 626	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 627	struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
 628
 629	mtk_ddp_comp_enable_vblank(comp);
 630
 631	return 0;
 632}
 633
 634static void mtk_drm_crtc_disable_vblank(struct drm_crtc *crtc)
 635{
 636	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 637	struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
 638
 639	mtk_ddp_comp_disable_vblank(comp);
 640}
 641
 642int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct drm_plane *plane,
 643			     struct mtk_plane_state *state)
 644{
 645	unsigned int local_layer;
 646	struct mtk_ddp_comp *comp;
 647
 648	comp = mtk_drm_ddp_comp_for_plane(crtc, plane, &local_layer);
 649	if (comp)
 650		return mtk_ddp_comp_layer_check(comp, local_layer, state);
 651	return 0;
 652}
 653
 654void mtk_drm_crtc_async_update(struct drm_crtc *crtc, struct drm_plane *plane,
 655			       struct drm_atomic_state *state)
 656{
 657	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 658
 659	if (!mtk_crtc->enabled)
 660		return;
 661
 662	mtk_drm_crtc_update_config(mtk_crtc, false);
 663}
 664
 665static void mtk_drm_crtc_atomic_enable(struct drm_crtc *crtc,
 666				       struct drm_atomic_state *state)
 667{
 668	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 669	struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
 670	int ret;
 671
 672	DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
 673
 674	ret = pm_runtime_resume_and_get(comp->dev);
 675	if (ret < 0) {
 676		DRM_DEV_ERROR(comp->dev, "Failed to enable power domain: %d\n", ret);
 677		return;
 678	}
 679
 680	ret = mtk_crtc_ddp_hw_init(mtk_crtc);
 681	if (ret) {
 682		pm_runtime_put(comp->dev);
 683		return;
 684	}
 685
 686	drm_crtc_vblank_on(crtc);
 687	mtk_crtc->enabled = true;
 688}
 689
 690static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc,
 691					struct drm_atomic_state *state)
 692{
 693	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 694	struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
 695	int i, ret;
 696
 697	DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
 698	if (!mtk_crtc->enabled)
 699		return;
 700
 701	/* Set all pending plane state to disabled */
 702	for (i = 0; i < mtk_crtc->layer_nr; i++) {
 703		struct drm_plane *plane = &mtk_crtc->planes[i];
 704		struct mtk_plane_state *plane_state;
 705
 706		plane_state = to_mtk_plane_state(plane->state);
 707		plane_state->pending.enable = false;
 708		plane_state->pending.config = true;
 709	}
 710	mtk_crtc->pending_planes = true;
 711
 712	mtk_drm_crtc_update_config(mtk_crtc, false);
 713#if IS_REACHABLE(CONFIG_MTK_CMDQ)
 714	/* Wait for planes to be disabled by cmdq */
 715	if (mtk_crtc->cmdq_client.chan)
 716		wait_event_timeout(mtk_crtc->cb_blocking_queue,
 717				   mtk_crtc->cmdq_vblank_cnt == 0,
 718				   msecs_to_jiffies(500));
 719#endif
 720	/* Wait for planes to be disabled */
 721	drm_crtc_wait_one_vblank(crtc);
 722
 723	drm_crtc_vblank_off(crtc);
 724	mtk_crtc_ddp_hw_fini(mtk_crtc);
 725	ret = pm_runtime_put(comp->dev);
 726	if (ret < 0)
 727		DRM_DEV_ERROR(comp->dev, "Failed to disable power domain: %d\n", ret);
 728
 729	mtk_crtc->enabled = false;
 730}
 731
 732static void mtk_drm_crtc_atomic_begin(struct drm_crtc *crtc,
 733				      struct drm_atomic_state *state)
 734{
 735	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
 736									  crtc);
 737	struct mtk_crtc_state *mtk_crtc_state = to_mtk_crtc_state(crtc_state);
 738	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 739
 740	if (mtk_crtc->event && mtk_crtc_state->base.event)
 741		DRM_ERROR("new event while there is still a pending event\n");
 742
 743	if (mtk_crtc_state->base.event) {
 744		mtk_crtc_state->base.event->pipe = drm_crtc_index(crtc);
 745		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 746		mtk_crtc->event = mtk_crtc_state->base.event;
 747		mtk_crtc_state->base.event = NULL;
 748	}
 749}
 750
 751static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
 752				      struct drm_atomic_state *state)
 753{
 754	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 
 
 755	int i;
 756
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 757	if (crtc->state->color_mgmt_changed)
 758		for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 759			mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i], crtc->state);
 760			mtk_ddp_ctm_set(mtk_crtc->ddp_comp[i], crtc->state);
 761		}
 762	mtk_drm_crtc_update_config(mtk_crtc, !!mtk_crtc->event);
 
 
 
 763}
 764
 765static const struct drm_crtc_funcs mtk_crtc_funcs = {
 766	.set_config		= drm_atomic_helper_set_config,
 767	.page_flip		= drm_atomic_helper_page_flip,
 768	.destroy		= mtk_drm_crtc_destroy,
 769	.reset			= mtk_drm_crtc_reset,
 770	.atomic_duplicate_state	= mtk_drm_crtc_duplicate_state,
 771	.atomic_destroy_state	= mtk_drm_crtc_destroy_state,
 
 772	.enable_vblank		= mtk_drm_crtc_enable_vblank,
 773	.disable_vblank		= mtk_drm_crtc_disable_vblank,
 774};
 775
 776static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
 777	.mode_fixup	= mtk_drm_crtc_mode_fixup,
 778	.mode_set_nofb	= mtk_drm_crtc_mode_set_nofb,
 779	.atomic_begin	= mtk_drm_crtc_atomic_begin,
 780	.atomic_flush	= mtk_drm_crtc_atomic_flush,
 781	.atomic_enable	= mtk_drm_crtc_atomic_enable,
 782	.atomic_disable	= mtk_drm_crtc_atomic_disable,
 783};
 784
 785static int mtk_drm_crtc_init(struct drm_device *drm,
 786			     struct mtk_drm_crtc *mtk_crtc,
 787			     unsigned int pipe)
 
 788{
 789	struct drm_plane *primary = NULL;
 790	struct drm_plane *cursor = NULL;
 791	int i, ret;
 792
 793	for (i = 0; i < mtk_crtc->layer_nr; i++) {
 794		if (mtk_crtc->planes[i].type == DRM_PLANE_TYPE_PRIMARY)
 795			primary = &mtk_crtc->planes[i];
 796		else if (mtk_crtc->planes[i].type == DRM_PLANE_TYPE_CURSOR)
 797			cursor = &mtk_crtc->planes[i];
 798	}
 799
 800	ret = drm_crtc_init_with_planes(drm, &mtk_crtc->base, primary, cursor,
 801					&mtk_crtc_funcs, NULL);
 802	if (ret)
 803		goto err_cleanup_crtc;
 804
 805	drm_crtc_helper_add(&mtk_crtc->base, &mtk_crtc_helper_funcs);
 806
 807	return 0;
 808
 809err_cleanup_crtc:
 810	drm_crtc_cleanup(&mtk_crtc->base);
 811	return ret;
 812}
 813
 814static int mtk_drm_crtc_num_comp_planes(struct mtk_drm_crtc *mtk_crtc,
 815					int comp_idx)
 816{
 817	struct mtk_ddp_comp *comp;
 
 818
 819	if (comp_idx > 1)
 820		return 0;
 821
 822	comp = mtk_crtc->ddp_comp[comp_idx];
 823	if (!comp->funcs)
 824		return 0;
 825
 826	if (comp_idx == 1 && !comp->funcs->bgclr_in_on)
 827		return 0;
 828
 829	return mtk_ddp_comp_layer_nr(comp);
 830}
 831
 832static inline
 833enum drm_plane_type mtk_drm_crtc_plane_type(unsigned int plane_idx,
 834					    unsigned int num_planes)
 835{
 836	if (plane_idx == 0)
 837		return DRM_PLANE_TYPE_PRIMARY;
 838	else if (plane_idx == (num_planes - 1))
 839		return DRM_PLANE_TYPE_CURSOR;
 840	else
 841		return DRM_PLANE_TYPE_OVERLAY;
 842
 843}
 844
 845static int mtk_drm_crtc_init_comp_planes(struct drm_device *drm_dev,
 846					 struct mtk_drm_crtc *mtk_crtc,
 847					 int comp_idx, int pipe)
 848{
 849	int num_planes = mtk_drm_crtc_num_comp_planes(mtk_crtc, comp_idx);
 850	struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[comp_idx];
 851	int i, ret;
 852
 853	for (i = 0; i < num_planes; i++) {
 854		ret = mtk_plane_init(drm_dev,
 855				&mtk_crtc->planes[mtk_crtc->layer_nr],
 856				BIT(pipe),
 857				mtk_drm_crtc_plane_type(mtk_crtc->layer_nr,
 858							num_planes),
 859				mtk_ddp_comp_supported_rotations(comp));
 860		if (ret)
 861			return ret;
 862
 863		mtk_crtc->layer_nr++;
 864	}
 865	return 0;
 866}
 867
 868int mtk_drm_crtc_create(struct drm_device *drm_dev,
 869			const enum mtk_ddp_comp_id *path, unsigned int path_len)
 870{
 871	struct mtk_drm_private *priv = drm_dev->dev_private;
 872	struct device *dev = drm_dev->dev;
 873	struct mtk_drm_crtc *mtk_crtc;
 874	unsigned int num_comp_planes = 0;
 
 875	int pipe = priv->num_pipes;
 876	int ret;
 877	int i;
 878	bool has_ctm = false;
 879	uint gamma_lut_size = 0;
 880
 881	if (!path)
 882		return 0;
 883
 884	for (i = 0; i < path_len; i++) {
 885		enum mtk_ddp_comp_id comp_id = path[i];
 886		struct device_node *node;
 887		struct mtk_ddp_comp *comp;
 888
 889		node = priv->comp_node[comp_id];
 890		comp = &priv->ddp_comp[comp_id];
 891
 892		if (!node) {
 893			dev_info(dev,
 894				 "Not creating crtc %d because component %d is disabled or missing\n",
 895				 pipe, comp_id);
 896			return 0;
 897		}
 898
 899		if (!comp->dev) {
 900			dev_err(dev, "Component %pOF not initialized\n", node);
 901			return -ENODEV;
 902		}
 903	}
 904
 905	mtk_crtc = devm_kzalloc(dev, sizeof(*mtk_crtc), GFP_KERNEL);
 906	if (!mtk_crtc)
 907		return -ENOMEM;
 908
 909	mtk_crtc->mmsys_dev = priv->mmsys_dev;
 910	mtk_crtc->ddp_comp_nr = path_len;
 911	mtk_crtc->ddp_comp = devm_kmalloc_array(dev, mtk_crtc->ddp_comp_nr,
 912						sizeof(*mtk_crtc->ddp_comp),
 913						GFP_KERNEL);
 914	if (!mtk_crtc->ddp_comp)
 915		return -ENOMEM;
 916
 917	mtk_crtc->mutex = mtk_mutex_get(priv->mutex_dev);
 918	if (IS_ERR(mtk_crtc->mutex)) {
 919		ret = PTR_ERR(mtk_crtc->mutex);
 920		dev_err(dev, "Failed to get mutex: %d\n", ret);
 921		return ret;
 922	}
 923
 924	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 925		enum mtk_ddp_comp_id comp_id = path[i];
 926		struct mtk_ddp_comp *comp;
 
 927
 928		comp = &priv->ddp_comp[comp_id];
 929		mtk_crtc->ddp_comp[i] = comp;
 930
 931		if (comp->funcs) {
 932			if (comp->funcs->gamma_set)
 933				gamma_lut_size = MTK_LUT_SIZE;
 934
 935			if (comp->funcs->ctm_set)
 936				has_ctm = true;
 937		}
 938
 939		mtk_ddp_comp_register_vblank_cb(comp, mtk_crtc_ddp_irq,
 940						&mtk_crtc->base);
 941	}
 942
 943	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
 944		num_comp_planes += mtk_drm_crtc_num_comp_planes(mtk_crtc, i);
 945
 946	mtk_crtc->planes = devm_kcalloc(dev, num_comp_planes,
 947					sizeof(struct drm_plane), GFP_KERNEL);
 948
 949	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 950		ret = mtk_drm_crtc_init_comp_planes(drm_dev, mtk_crtc, i,
 951						    pipe);
 
 
 952		if (ret)
 953			return ret;
 954	}
 955
 956	ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, pipe);
 
 
 957	if (ret < 0)
 958		return ret;
 959
 960	if (gamma_lut_size)
 961		drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size);
 962	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, has_ctm, gamma_lut_size);
 963	priv->num_pipes++;
 964	mutex_init(&mtk_crtc->hw_lock);
 965
 966#if IS_REACHABLE(CONFIG_MTK_CMDQ)
 967	mtk_crtc->cmdq_client.client.dev = mtk_crtc->mmsys_dev;
 968	mtk_crtc->cmdq_client.client.tx_block = false;
 969	mtk_crtc->cmdq_client.client.knows_txdone = true;
 970	mtk_crtc->cmdq_client.client.rx_callback = ddp_cmdq_cb;
 971	mtk_crtc->cmdq_client.chan =
 972			mbox_request_channel(&mtk_crtc->cmdq_client.client,
 973					     drm_crtc_index(&mtk_crtc->base));
 974	if (IS_ERR(mtk_crtc->cmdq_client.chan)) {
 975		dev_dbg(dev, "mtk_crtc %d failed to create mailbox client, writing register by CPU now\n",
 976			drm_crtc_index(&mtk_crtc->base));
 977		mtk_crtc->cmdq_client.chan = NULL;
 978	}
 979
 980	if (mtk_crtc->cmdq_client.chan) {
 981		ret = of_property_read_u32_index(priv->mutex_node,
 982						 "mediatek,gce-events",
 983						 drm_crtc_index(&mtk_crtc->base),
 984						 &mtk_crtc->cmdq_event);
 985		if (ret) {
 986			dev_dbg(dev, "mtk_crtc %d failed to get mediatek,gce-events property\n",
 987				drm_crtc_index(&mtk_crtc->base));
 988			mbox_free_channel(mtk_crtc->cmdq_client.chan);
 989			mtk_crtc->cmdq_client.chan = NULL;
 990		} else {
 991			ret = mtk_drm_cmdq_pkt_create(&mtk_crtc->cmdq_client,
 992						      &mtk_crtc->cmdq_handle,
 993						      PAGE_SIZE);
 994			if (ret) {
 995				dev_dbg(dev, "mtk_crtc %d failed to create cmdq packet\n",
 996					drm_crtc_index(&mtk_crtc->base));
 997				mbox_free_channel(mtk_crtc->cmdq_client.chan);
 998				mtk_crtc->cmdq_client.chan = NULL;
 999			}
1000		}
1001
1002		/* for sending blocking cmd in crtc disable */
1003		init_waitqueue_head(&mtk_crtc->cb_blocking_queue);
1004	}
1005#endif
1006	return 0;
1007}