1// SPDX-License-Identifier: GPL-2.0-or-later
2/* exynos_drm_crtc.c
3 *
4 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
5 * Authors:
6 *	Inki Dae <inki.dae@samsung.com>
7 *	Joonyoung Shim <jy0922.shim@samsung.com>
8 *	Seung-Woo Kim <sw0312.kim@samsung.com>
9 */
10
11#include <drm/drm_atomic.h>
12#include <drm/drm_atomic_helper.h>
13#include <drm/drm_encoder.h>
14#include <drm/drm_probe_helper.h>
15#include <drm/drm_vblank.h>
16
17#include "exynos_drm_crtc.h"
18#include "exynos_drm_drv.h"
19#include "exynos_drm_plane.h"
20
21static void exynos_drm_crtc_atomic_enable(struct drm_crtc *crtc,
22					  struct drm_crtc_state *old_state)
23{
24	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
25
26	if (exynos_crtc->ops->atomic_enable)
27		exynos_crtc->ops->atomic_enable(exynos_crtc);
28
29	drm_crtc_vblank_on(crtc);
30}
31
32static void exynos_drm_crtc_atomic_disable(struct drm_crtc *crtc,
33					   struct drm_crtc_state *old_state)
34{
35	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
36
37	drm_crtc_vblank_off(crtc);
38
39	if (exynos_crtc->ops->atomic_disable)
40		exynos_crtc->ops->atomic_disable(exynos_crtc);
41
42	spin_lock_irq(&crtc->dev->event_lock);
43	if (crtc->state->event && !crtc->state->active) {
44		drm_crtc_send_vblank_event(crtc, crtc->state->event);
45		crtc->state->event = NULL;
46	}
47	spin_unlock_irq(&crtc->dev->event_lock);
48}
49
50static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
51				     struct drm_crtc_state *state)
52{
53	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
54
55	if (!state->enable)
56		return 0;
57
58	if (exynos_crtc->ops->atomic_check)
59		return exynos_crtc->ops->atomic_check(exynos_crtc, state);
60
61	return 0;
62}
63
64static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
65				     struct drm_crtc_state *old_crtc_state)
66{
67	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
68
69	if (exynos_crtc->ops->atomic_begin)
70		exynos_crtc->ops->atomic_begin(exynos_crtc);
71}
72
73static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
74				     struct drm_crtc_state *old_crtc_state)
75{
76	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
77
78	if (exynos_crtc->ops->atomic_flush)
79		exynos_crtc->ops->atomic_flush(exynos_crtc);
80}
81
82static enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc,
83	const struct drm_display_mode *mode)
84{
85	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
86
87	if (exynos_crtc->ops->mode_valid)
88		return exynos_crtc->ops->mode_valid(exynos_crtc, mode);
89
90	return MODE_OK;
91}
92
93static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc,
94		const struct drm_display_mode *mode,
95		struct drm_display_mode *adjusted_mode)
96{
97	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
98
99	if (exynos_crtc->ops->mode_fixup)
100		return exynos_crtc->ops->mode_fixup(exynos_crtc, mode,
101				adjusted_mode);
102
103	return true;
104}
105
106
107static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
108	.mode_valid	= exynos_crtc_mode_valid,
109	.mode_fixup	= exynos_crtc_mode_fixup,
110	.atomic_check	= exynos_crtc_atomic_check,
111	.atomic_begin	= exynos_crtc_atomic_begin,
112	.atomic_flush	= exynos_crtc_atomic_flush,
113	.atomic_enable	= exynos_drm_crtc_atomic_enable,
114	.atomic_disable	= exynos_drm_crtc_atomic_disable,
115};
116
117void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc)
118{
119	struct drm_crtc *crtc = &exynos_crtc->base;
120	struct drm_pending_vblank_event *event = crtc->state->event;
121	unsigned long flags;
122
123	if (!event)
124		return;
125	crtc->state->event = NULL;
126
127	WARN_ON(drm_crtc_vblank_get(crtc) != 0);
128
129	spin_lock_irqsave(&crtc->dev->event_lock, flags);
130	drm_crtc_arm_vblank_event(crtc, event);
131	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
132}
133
134static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
135{
136	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
137
138	drm_crtc_cleanup(crtc);
139	kfree(exynos_crtc);
140}
141
142static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc)
143{
144	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
145
146	if (exynos_crtc->ops->enable_vblank)
147		return exynos_crtc->ops->enable_vblank(exynos_crtc);
148
149	return 0;
150}
151
152static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
153{
154	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
155
156	if (exynos_crtc->ops->disable_vblank)
157		exynos_crtc->ops->disable_vblank(exynos_crtc);
158}
159
160static const struct drm_crtc_funcs exynos_crtc_funcs = {
161	.set_config	= drm_atomic_helper_set_config,
162	.page_flip	= drm_atomic_helper_page_flip,
163	.destroy	= exynos_drm_crtc_destroy,
164	.reset = drm_atomic_helper_crtc_reset,
165	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
166	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
167	.enable_vblank = exynos_drm_crtc_enable_vblank,
168	.disable_vblank = exynos_drm_crtc_disable_vblank,
169};
170
171struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
172					struct drm_plane *plane,
173					enum exynos_drm_output_type type,
174					const struct exynos_drm_crtc_ops *ops,
175					void *ctx)
176{
177	struct exynos_drm_crtc *exynos_crtc;
178	struct drm_crtc *crtc;
179	int ret;
180
181	exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
182	if (!exynos_crtc)
183		return ERR_PTR(-ENOMEM);
184
185	exynos_crtc->type = type;
186	exynos_crtc->ops = ops;
187	exynos_crtc->ctx = ctx;
188
189	crtc = &exynos_crtc->base;
190
191	ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
192					&exynos_crtc_funcs, NULL);
193	if (ret < 0)
194		goto err_crtc;
195
196	drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
197
198	return exynos_crtc;
199
200err_crtc:
201	plane->funcs->destroy(plane);
202	kfree(exynos_crtc);
203	return ERR_PTR(ret);
204}
205
206struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev,
207				       enum exynos_drm_output_type out_type)
208{
209	struct drm_crtc *crtc;
210
211	drm_for_each_crtc(crtc, drm_dev)
212		if (to_exynos_crtc(crtc)->type == out_type)
213			return to_exynos_crtc(crtc);
214
215	return ERR_PTR(-ENODEV);
216}
217
218int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder,
219		enum exynos_drm_output_type out_type)
220{
221	struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev,
222						out_type);
223
224	if (IS_ERR(crtc))
225		return PTR_ERR(crtc);
226
227	encoder->possible_crtcs = drm_crtc_mask(&crtc->base);
228
229	return 0;
230}
231
232void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
233{
234	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
235
236	if (exynos_crtc->ops->te_handler)
237		exynos_crtc->ops->te_handler(exynos_crtc);
238}
239