tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 if (crtc->state->event && !crtc->state->active) {
44 spin_lock_irq(&crtc->dev->event_lock);
45 drm_crtc_send_vblank_event(crtc, crtc->state->event);
46 spin_unlock_irq(&crtc->dev->event_lock);
47
48 crtc->state->event = NULL;
49 }
50}
51
52static void
53exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
54{
55 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
56
57 if (exynos_crtc->ops->commit)
58 exynos_crtc->ops->commit(exynos_crtc);
59}
60
61static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
62 struct drm_crtc_state *state)
63{
64 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
65
66 if (!state->enable)
67 return 0;
68
69 if (exynos_crtc->ops->atomic_check)
70 return exynos_crtc->ops->atomic_check(exynos_crtc, state);
71
72 return 0;
73}
74
75static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
76 struct drm_crtc_state *old_crtc_state)
77{
78 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
79
80 if (exynos_crtc->ops->atomic_begin)
81 exynos_crtc->ops->atomic_begin(exynos_crtc);
82}
83
84static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
85 struct drm_crtc_state *old_crtc_state)
86{
87 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
88 struct drm_pending_vblank_event *event;
89 unsigned long flags;
90
91 if (exynos_crtc->ops->atomic_flush)
92 exynos_crtc->ops->atomic_flush(exynos_crtc);
93
94 event = crtc->state->event;
95 if (event) {
96 crtc->state->event = NULL;
97
98 spin_lock_irqsave(&crtc->dev->event_lock, flags);
99 if (drm_crtc_vblank_get(crtc) == 0)
100 drm_crtc_arm_vblank_event(crtc, event);
101 else
102 drm_crtc_send_vblank_event(crtc, event);
103 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
104 }
105
106}
107
108static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
109 .enable = exynos_drm_crtc_enable,
110 .disable = exynos_drm_crtc_disable,
111 .mode_set_nofb = exynos_drm_crtc_mode_set_nofb,
112 .atomic_check = exynos_crtc_atomic_check,
113 .atomic_begin = exynos_crtc_atomic_begin,
114 .atomic_flush = exynos_crtc_atomic_flush,
115};
116
117static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
118{
119 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
120
121 drm_crtc_cleanup(crtc);
122 kfree(exynos_crtc);
123}
124
125static const struct drm_crtc_funcs exynos_crtc_funcs = {
126 .set_config = drm_atomic_helper_set_config,
127 .page_flip = drm_atomic_helper_page_flip,
128 .destroy = exynos_drm_crtc_destroy,
129 .reset = drm_atomic_helper_crtc_reset,
130 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
131 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
132};
133
134struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
135 struct drm_plane *plane,
136 int pipe,
137 enum exynos_drm_output_type type,
138 const struct exynos_drm_crtc_ops *ops,
139 void *ctx)
140{
141 struct exynos_drm_crtc *exynos_crtc;
142 struct drm_crtc *crtc;
143 int ret;
144
145 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
146 if (!exynos_crtc)
147 return ERR_PTR(-ENOMEM);
148
149 exynos_crtc->pipe = pipe;
150 exynos_crtc->type = type;
151 exynos_crtc->ops = ops;
152 exynos_crtc->ctx = ctx;
153
154 crtc = &exynos_crtc->base;
155
156 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
157 &exynos_crtc_funcs, NULL);
158 if (ret < 0)
159 goto err_crtc;
160
161 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
162
163 return exynos_crtc;
164
165err_crtc:
166 plane->funcs->destroy(plane);
167 kfree(exynos_crtc);
168 return ERR_PTR(ret);
169}
170
171int exynos_drm_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
172{
173 struct exynos_drm_crtc *exynos_crtc = exynos_drm_crtc_from_pipe(dev,
174 pipe);
175
176 if (exynos_crtc->ops->enable_vblank)
177 return exynos_crtc->ops->enable_vblank(exynos_crtc);
178
179 return 0;
180}
181
182void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned int pipe)
183{
184 struct exynos_drm_crtc *exynos_crtc = exynos_drm_crtc_from_pipe(dev,
185 pipe);
186
187 if (exynos_crtc->ops->disable_vblank)
188 exynos_crtc->ops->disable_vblank(exynos_crtc);
189}
190
191int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
192 enum exynos_drm_output_type out_type)
193{
194 struct drm_crtc *crtc;
195
196 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
197 struct exynos_drm_crtc *exynos_crtc;
198
199 exynos_crtc = to_exynos_crtc(crtc);
200 if (exynos_crtc->type == out_type)
201 return exynos_crtc->pipe;
202 }
203
204 return -EPERM;
205}
206
207void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
208{
209 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
210
211 if (exynos_crtc->ops->te_handler)
212 exynos_crtc->ops->te_handler(exynos_crtc);
213}