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1/* exynos_drm_crtc.c
2 *
3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
4 * Authors:
5 * Inki Dae <inki.dae@samsung.com>
6 * Joonyoung Shim <jy0922.shim@samsung.com>
7 * Seung-Woo Kim <sw0312.kim@samsung.com>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 */
14
15#include <drm/drmP.h>
16#include <drm/drm_crtc_helper.h>
17#include <drm/drm_atomic.h>
18#include <drm/drm_atomic_helper.h>
19
20#include "exynos_drm_crtc.h"
21#include "exynos_drm_drv.h"
22#include "exynos_drm_plane.h"
23
24static void exynos_drm_crtc_enable(struct drm_crtc *crtc)
25{
26 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
27
28 if (exynos_crtc->ops->enable)
29 exynos_crtc->ops->enable(exynos_crtc);
30
31 drm_crtc_vblank_on(crtc);
32}
33
34static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
35{
36 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
37
38 drm_crtc_vblank_off(crtc);
39
40 if (exynos_crtc->ops->disable)
41 exynos_crtc->ops->disable(exynos_crtc);
42}
43
44static void
45exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
46{
47 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
48
49 if (exynos_crtc->ops->commit)
50 exynos_crtc->ops->commit(exynos_crtc);
51}
52
53static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
54 struct drm_crtc_state *state)
55{
56 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
57
58 if (!state->enable)
59 return 0;
60
61 if (exynos_crtc->ops->atomic_check)
62 return exynos_crtc->ops->atomic_check(exynos_crtc, state);
63
64 return 0;
65}
66
67static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
68 struct drm_crtc_state *old_crtc_state)
69{
70 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
71
72 exynos_crtc->event = crtc->state->event;
73
74 if (exynos_crtc->ops->atomic_begin)
75 exynos_crtc->ops->atomic_begin(exynos_crtc);
76}
77
78static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
79 struct drm_crtc_state *old_crtc_state)
80{
81 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
82
83 if (exynos_crtc->ops->atomic_flush)
84 exynos_crtc->ops->atomic_flush(exynos_crtc);
85}
86
87static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
88 .enable = exynos_drm_crtc_enable,
89 .disable = exynos_drm_crtc_disable,
90 .mode_set_nofb = exynos_drm_crtc_mode_set_nofb,
91 .atomic_check = exynos_crtc_atomic_check,
92 .atomic_begin = exynos_crtc_atomic_begin,
93 .atomic_flush = exynos_crtc_atomic_flush,
94};
95
96static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
97{
98 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
99 struct exynos_drm_private *private = crtc->dev->dev_private;
100
101 private->crtc[exynos_crtc->pipe] = NULL;
102
103 drm_crtc_cleanup(crtc);
104 kfree(exynos_crtc);
105}
106
107static const struct drm_crtc_funcs exynos_crtc_funcs = {
108 .set_config = drm_atomic_helper_set_config,
109 .page_flip = drm_atomic_helper_page_flip,
110 .destroy = exynos_drm_crtc_destroy,
111 .reset = drm_atomic_helper_crtc_reset,
112 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
113 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
114};
115
116struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
117 struct drm_plane *plane,
118 int pipe,
119 enum exynos_drm_output_type type,
120 const struct exynos_drm_crtc_ops *ops,
121 void *ctx)
122{
123 struct exynos_drm_crtc *exynos_crtc;
124 struct exynos_drm_private *private = drm_dev->dev_private;
125 struct drm_crtc *crtc;
126 int ret;
127
128 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
129 if (!exynos_crtc)
130 return ERR_PTR(-ENOMEM);
131
132 exynos_crtc->pipe = pipe;
133 exynos_crtc->type = type;
134 exynos_crtc->ops = ops;
135 exynos_crtc->ctx = ctx;
136
137 init_waitqueue_head(&exynos_crtc->wait_update);
138
139 crtc = &exynos_crtc->base;
140
141 private->crtc[pipe] = crtc;
142
143 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
144 &exynos_crtc_funcs, NULL);
145 if (ret < 0)
146 goto err_crtc;
147
148 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
149
150 return exynos_crtc;
151
152err_crtc:
153 plane->funcs->destroy(plane);
154 kfree(exynos_crtc);
155 return ERR_PTR(ret);
156}
157
158int exynos_drm_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
159{
160 struct exynos_drm_private *private = dev->dev_private;
161 struct exynos_drm_crtc *exynos_crtc =
162 to_exynos_crtc(private->crtc[pipe]);
163
164 if (exynos_crtc->ops->enable_vblank)
165 return exynos_crtc->ops->enable_vblank(exynos_crtc);
166
167 return 0;
168}
169
170void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned int pipe)
171{
172 struct exynos_drm_private *private = dev->dev_private;
173 struct exynos_drm_crtc *exynos_crtc =
174 to_exynos_crtc(private->crtc[pipe]);
175
176 if (exynos_crtc->ops->disable_vblank)
177 exynos_crtc->ops->disable_vblank(exynos_crtc);
178}
179
180void exynos_drm_crtc_wait_pending_update(struct exynos_drm_crtc *exynos_crtc)
181{
182 wait_event_timeout(exynos_crtc->wait_update,
183 (atomic_read(&exynos_crtc->pending_update) == 0),
184 msecs_to_jiffies(50));
185}
186
187void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc,
188 struct exynos_drm_plane *exynos_plane)
189{
190 struct drm_crtc *crtc = &exynos_crtc->base;
191 unsigned long flags;
192
193 exynos_plane->pending_fb = NULL;
194
195 if (atomic_dec_and_test(&exynos_crtc->pending_update))
196 wake_up(&exynos_crtc->wait_update);
197
198 spin_lock_irqsave(&crtc->dev->event_lock, flags);
199 if (exynos_crtc->event)
200 drm_crtc_send_vblank_event(crtc, exynos_crtc->event);
201
202 exynos_crtc->event = NULL;
203 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
204}
205
206int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
207 enum exynos_drm_output_type out_type)
208{
209 struct drm_crtc *crtc;
210
211 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
212 struct exynos_drm_crtc *exynos_crtc;
213
214 exynos_crtc = to_exynos_crtc(crtc);
215 if (exynos_crtc->type == out_type)
216 return exynos_crtc->pipe;
217 }
218
219 return -EPERM;
220}
221
222void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
223{
224 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
225
226 if (exynos_crtc->ops->te_handler)
227 exynos_crtc->ops->te_handler(exynos_crtc);
228}
229
230void exynos_drm_crtc_cancel_page_flip(struct drm_crtc *crtc,
231 struct drm_file *file)
232{
233 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
234 struct drm_pending_vblank_event *e;
235 unsigned long flags;
236
237 spin_lock_irqsave(&crtc->dev->event_lock, flags);
238 e = exynos_crtc->event;
239 if (e && e->base.file_priv == file) {
240 exynos_crtc->event = NULL;
241 /*
242 * event will be destroyed by core part
243 * so below line should be removed later with core changes
244 */
245 e->base.destroy(&e->base);
246 /*
247 * event_space will be increased by core part
248 * so below line should be removed later with core changes.
249 */
250 file->event_space += sizeof(e->event);
251 atomic_dec(&exynos_crtc->pending_update);
252 }
253 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
254}