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 int exynos_crtc_atomic_check(struct drm_crtc *crtc,
53 struct drm_crtc_state *state)
54{
55 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
56
57 if (!state->enable)
58 return 0;
59
60 if (exynos_crtc->ops->atomic_check)
61 return exynos_crtc->ops->atomic_check(exynos_crtc, state);
62
63 return 0;
64}
65
66static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
67 struct drm_crtc_state *old_crtc_state)
68{
69 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
70
71 if (exynos_crtc->ops->atomic_begin)
72 exynos_crtc->ops->atomic_begin(exynos_crtc);
73}
74
75static void exynos_crtc_atomic_flush(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_flush)
81 exynos_crtc->ops->atomic_flush(exynos_crtc);
82}
83
84static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
85 .enable = exynos_drm_crtc_enable,
86 .disable = exynos_drm_crtc_disable,
87 .atomic_check = exynos_crtc_atomic_check,
88 .atomic_begin = exynos_crtc_atomic_begin,
89 .atomic_flush = exynos_crtc_atomic_flush,
90};
91
92void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc)
93{
94 struct drm_crtc *crtc = &exynos_crtc->base;
95 struct drm_pending_vblank_event *event = crtc->state->event;
96 unsigned long flags;
97
98 if (!event)
99 return;
100 crtc->state->event = NULL;
101
102 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
103
104 spin_lock_irqsave(&crtc->dev->event_lock, flags);
105 drm_crtc_arm_vblank_event(crtc, event);
106 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
107}
108
109static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
110{
111 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
112
113 drm_crtc_cleanup(crtc);
114 kfree(exynos_crtc);
115}
116
117static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc)
118{
119 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
120
121 if (exynos_crtc->ops->enable_vblank)
122 return exynos_crtc->ops->enable_vblank(exynos_crtc);
123
124 return 0;
125}
126
127static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
128{
129 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
130
131 if (exynos_crtc->ops->disable_vblank)
132 exynos_crtc->ops->disable_vblank(exynos_crtc);
133}
134
135static u32 exynos_drm_crtc_get_vblank_counter(struct drm_crtc *crtc)
136{
137 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
138
139 if (exynos_crtc->ops->get_vblank_counter)
140 return exynos_crtc->ops->get_vblank_counter(exynos_crtc);
141
142 return 0;
143}
144
145static const struct drm_crtc_funcs exynos_crtc_funcs = {
146 .set_config = drm_atomic_helper_set_config,
147 .page_flip = drm_atomic_helper_page_flip,
148 .destroy = exynos_drm_crtc_destroy,
149 .reset = drm_atomic_helper_crtc_reset,
150 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
151 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
152 .enable_vblank = exynos_drm_crtc_enable_vblank,
153 .disable_vblank = exynos_drm_crtc_disable_vblank,
154 .get_vblank_counter = exynos_drm_crtc_get_vblank_counter,
155};
156
157struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
158 struct drm_plane *plane,
159 enum exynos_drm_output_type type,
160 const struct exynos_drm_crtc_ops *ops,
161 void *ctx)
162{
163 struct exynos_drm_crtc *exynos_crtc;
164 struct drm_crtc *crtc;
165 int ret;
166
167 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
168 if (!exynos_crtc)
169 return ERR_PTR(-ENOMEM);
170
171 exynos_crtc->type = type;
172 exynos_crtc->ops = ops;
173 exynos_crtc->ctx = ctx;
174
175 crtc = &exynos_crtc->base;
176
177 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
178 &exynos_crtc_funcs, NULL);
179 if (ret < 0)
180 goto err_crtc;
181
182 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
183
184 return exynos_crtc;
185
186err_crtc:
187 plane->funcs->destroy(plane);
188 kfree(exynos_crtc);
189 return ERR_PTR(ret);
190}
191
192int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
193 enum exynos_drm_output_type out_type)
194{
195 struct drm_crtc *crtc;
196
197 drm_for_each_crtc(crtc, drm_dev)
198 if (to_exynos_crtc(crtc)->type == out_type)
199 return drm_crtc_index(crtc);
200
201 return -EPERM;
202}
203
204void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
205{
206 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
207
208 if (exynos_crtc->ops->te_handler)
209 exynos_crtc->ops->te_handler(exynos_crtc);
210}