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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#include <drm/drm_encoder.h>
20
21#include "exynos_drm_crtc.h"
22#include "exynos_drm_drv.h"
23#include "exynos_drm_plane.h"
24
25static void exynos_drm_crtc_atomic_enable(struct drm_crtc *crtc,
26 struct drm_crtc_state *old_state)
27{
28 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
29
30 if (exynos_crtc->ops->enable)
31 exynos_crtc->ops->enable(exynos_crtc);
32
33 drm_crtc_vblank_on(crtc);
34}
35
36static void exynos_drm_crtc_atomic_disable(struct drm_crtc *crtc,
37 struct drm_crtc_state *old_state)
38{
39 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
40
41 drm_crtc_vblank_off(crtc);
42
43 if (exynos_crtc->ops->disable)
44 exynos_crtc->ops->disable(exynos_crtc);
45
46 if (crtc->state->event && !crtc->state->active) {
47 spin_lock_irq(&crtc->dev->event_lock);
48 drm_crtc_send_vblank_event(crtc, crtc->state->event);
49 spin_unlock_irq(&crtc->dev->event_lock);
50
51 crtc->state->event = NULL;
52 }
53}
54
55static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
56 struct drm_crtc_state *state)
57{
58 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
59
60 if (!state->enable)
61 return 0;
62
63 if (exynos_crtc->ops->atomic_check)
64 return exynos_crtc->ops->atomic_check(exynos_crtc, state);
65
66 return 0;
67}
68
69static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
70 struct drm_crtc_state *old_crtc_state)
71{
72 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
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 enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc,
88 const struct drm_display_mode *mode)
89{
90 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
91
92 if (exynos_crtc->ops->mode_valid)
93 return exynos_crtc->ops->mode_valid(exynos_crtc, mode);
94
95 return MODE_OK;
96}
97
98static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc,
99 const struct drm_display_mode *mode,
100 struct drm_display_mode *adjusted_mode)
101{
102 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
103
104 if (exynos_crtc->ops->mode_fixup)
105 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode,
106 adjusted_mode);
107
108 return true;
109}
110
111
112static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
113 .mode_valid = exynos_crtc_mode_valid,
114 .mode_fixup = exynos_crtc_mode_fixup,
115 .atomic_check = exynos_crtc_atomic_check,
116 .atomic_begin = exynos_crtc_atomic_begin,
117 .atomic_flush = exynos_crtc_atomic_flush,
118 .atomic_enable = exynos_drm_crtc_atomic_enable,
119 .atomic_disable = exynos_drm_crtc_atomic_disable,
120};
121
122void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc)
123{
124 struct drm_crtc *crtc = &exynos_crtc->base;
125 struct drm_pending_vblank_event *event = crtc->state->event;
126 unsigned long flags;
127
128 if (!event)
129 return;
130 crtc->state->event = NULL;
131
132 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
133
134 spin_lock_irqsave(&crtc->dev->event_lock, flags);
135 drm_crtc_arm_vblank_event(crtc, event);
136 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
137}
138
139static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
140{
141 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
142
143 drm_crtc_cleanup(crtc);
144 kfree(exynos_crtc);
145}
146
147static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc)
148{
149 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
150
151 if (exynos_crtc->ops->enable_vblank)
152 return exynos_crtc->ops->enable_vblank(exynos_crtc);
153
154 return 0;
155}
156
157static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
158{
159 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
160
161 if (exynos_crtc->ops->disable_vblank)
162 exynos_crtc->ops->disable_vblank(exynos_crtc);
163}
164
165static u32 exynos_drm_crtc_get_vblank_counter(struct drm_crtc *crtc)
166{
167 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
168
169 if (exynos_crtc->ops->get_vblank_counter)
170 return exynos_crtc->ops->get_vblank_counter(exynos_crtc);
171
172 return 0;
173}
174
175static const struct drm_crtc_funcs exynos_crtc_funcs = {
176 .set_config = drm_atomic_helper_set_config,
177 .page_flip = drm_atomic_helper_page_flip,
178 .destroy = exynos_drm_crtc_destroy,
179 .reset = drm_atomic_helper_crtc_reset,
180 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
181 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
182 .enable_vblank = exynos_drm_crtc_enable_vblank,
183 .disable_vblank = exynos_drm_crtc_disable_vblank,
184 .get_vblank_counter = exynos_drm_crtc_get_vblank_counter,
185};
186
187struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
188 struct drm_plane *plane,
189 enum exynos_drm_output_type type,
190 const struct exynos_drm_crtc_ops *ops,
191 void *ctx)
192{
193 struct exynos_drm_crtc *exynos_crtc;
194 struct drm_crtc *crtc;
195 int ret;
196
197 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
198 if (!exynos_crtc)
199 return ERR_PTR(-ENOMEM);
200
201 exynos_crtc->type = type;
202 exynos_crtc->ops = ops;
203 exynos_crtc->ctx = ctx;
204
205 crtc = &exynos_crtc->base;
206
207 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
208 &exynos_crtc_funcs, NULL);
209 if (ret < 0)
210 goto err_crtc;
211
212 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
213
214 return exynos_crtc;
215
216err_crtc:
217 plane->funcs->destroy(plane);
218 kfree(exynos_crtc);
219 return ERR_PTR(ret);
220}
221
222struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev,
223 enum exynos_drm_output_type out_type)
224{
225 struct drm_crtc *crtc;
226
227 drm_for_each_crtc(crtc, drm_dev)
228 if (to_exynos_crtc(crtc)->type == out_type)
229 return to_exynos_crtc(crtc);
230
231 return ERR_PTR(-EPERM);
232}
233
234int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder,
235 enum exynos_drm_output_type out_type)
236{
237 struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev,
238 out_type);
239
240 if (IS_ERR(crtc))
241 return PTR_ERR(crtc);
242
243 encoder->possible_crtcs = drm_crtc_mask(&crtc->base);
244
245 return 0;
246}
247
248void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
249{
250 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
251
252 if (exynos_crtc->ops->te_handler)
253 exynos_crtc->ops->te_handler(exynos_crtc);
254}