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
exynos_drm_crtc_atomic_enable(struct drm_crtc * crtc,struct drm_crtc_state * old_state)21 static 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
exynos_drm_crtc_atomic_disable(struct drm_crtc * crtc,struct drm_crtc_state * old_state)32 static 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 if (crtc->state->event && !crtc->state->active) {
43 spin_lock_irq(&crtc->dev->event_lock);
44 drm_crtc_send_vblank_event(crtc, crtc->state->event);
45 spin_unlock_irq(&crtc->dev->event_lock);
46
47 crtc->state->event = NULL;
48 }
49 }
50
exynos_crtc_atomic_check(struct drm_crtc * crtc,struct drm_crtc_state * state)51 static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
52 struct drm_crtc_state *state)
53 {
54 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
55
56 if (!state->enable)
57 return 0;
58
59 if (exynos_crtc->ops->atomic_check)
60 return exynos_crtc->ops->atomic_check(exynos_crtc, state);
61
62 return 0;
63 }
64
exynos_crtc_atomic_begin(struct drm_crtc * crtc,struct drm_crtc_state * old_crtc_state)65 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
66 struct drm_crtc_state *old_crtc_state)
67 {
68 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
69
70 if (exynos_crtc->ops->atomic_begin)
71 exynos_crtc->ops->atomic_begin(exynos_crtc);
72 }
73
exynos_crtc_atomic_flush(struct drm_crtc * crtc,struct drm_crtc_state * old_crtc_state)74 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
75 struct drm_crtc_state *old_crtc_state)
76 {
77 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
78
79 if (exynos_crtc->ops->atomic_flush)
80 exynos_crtc->ops->atomic_flush(exynos_crtc);
81 }
82
exynos_crtc_mode_valid(struct drm_crtc * crtc,const struct drm_display_mode * mode)83 static enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc,
84 const struct drm_display_mode *mode)
85 {
86 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
87
88 if (exynos_crtc->ops->mode_valid)
89 return exynos_crtc->ops->mode_valid(exynos_crtc, mode);
90
91 return MODE_OK;
92 }
93
exynos_crtc_mode_fixup(struct drm_crtc * crtc,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)94 static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc,
95 const struct drm_display_mode *mode,
96 struct drm_display_mode *adjusted_mode)
97 {
98 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
99
100 if (exynos_crtc->ops->mode_fixup)
101 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode,
102 adjusted_mode);
103
104 return true;
105 }
106
107
108 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
109 .mode_valid = exynos_crtc_mode_valid,
110 .mode_fixup = exynos_crtc_mode_fixup,
111 .atomic_check = exynos_crtc_atomic_check,
112 .atomic_begin = exynos_crtc_atomic_begin,
113 .atomic_flush = exynos_crtc_atomic_flush,
114 .atomic_enable = exynos_drm_crtc_atomic_enable,
115 .atomic_disable = exynos_drm_crtc_atomic_disable,
116 };
117
exynos_crtc_handle_event(struct exynos_drm_crtc * exynos_crtc)118 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc)
119 {
120 struct drm_crtc *crtc = &exynos_crtc->base;
121 struct drm_pending_vblank_event *event = crtc->state->event;
122 unsigned long flags;
123
124 if (!event)
125 return;
126 crtc->state->event = NULL;
127
128 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
129
130 spin_lock_irqsave(&crtc->dev->event_lock, flags);
131 drm_crtc_arm_vblank_event(crtc, event);
132 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
133 }
134
exynos_drm_crtc_destroy(struct drm_crtc * crtc)135 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
136 {
137 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
138
139 drm_crtc_cleanup(crtc);
140 kfree(exynos_crtc);
141 }
142
exynos_drm_crtc_enable_vblank(struct drm_crtc * crtc)143 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc)
144 {
145 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
146
147 if (exynos_crtc->ops->enable_vblank)
148 return exynos_crtc->ops->enable_vblank(exynos_crtc);
149
150 return 0;
151 }
152
exynos_drm_crtc_disable_vblank(struct drm_crtc * crtc)153 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
154 {
155 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
156
157 if (exynos_crtc->ops->disable_vblank)
158 exynos_crtc->ops->disable_vblank(exynos_crtc);
159 }
160
161 static const struct drm_crtc_funcs exynos_crtc_funcs = {
162 .set_config = drm_atomic_helper_set_config,
163 .page_flip = drm_atomic_helper_page_flip,
164 .destroy = exynos_drm_crtc_destroy,
165 .reset = drm_atomic_helper_crtc_reset,
166 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
167 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
168 .enable_vblank = exynos_drm_crtc_enable_vblank,
169 .disable_vblank = exynos_drm_crtc_disable_vblank,
170 };
171
exynos_drm_crtc_create(struct drm_device * drm_dev,struct drm_plane * plane,enum exynos_drm_output_type type,const struct exynos_drm_crtc_ops * ops,void * ctx)172 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
173 struct drm_plane *plane,
174 enum exynos_drm_output_type type,
175 const struct exynos_drm_crtc_ops *ops,
176 void *ctx)
177 {
178 struct exynos_drm_crtc *exynos_crtc;
179 struct drm_crtc *crtc;
180 int ret;
181
182 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
183 if (!exynos_crtc)
184 return ERR_PTR(-ENOMEM);
185
186 exynos_crtc->type = type;
187 exynos_crtc->ops = ops;
188 exynos_crtc->ctx = ctx;
189
190 crtc = &exynos_crtc->base;
191
192 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
193 &exynos_crtc_funcs, NULL);
194 if (ret < 0)
195 goto err_crtc;
196
197 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
198
199 return exynos_crtc;
200
201 err_crtc:
202 plane->funcs->destroy(plane);
203 kfree(exynos_crtc);
204 return ERR_PTR(ret);
205 }
206
exynos_drm_crtc_get_by_type(struct drm_device * drm_dev,enum exynos_drm_output_type out_type)207 struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev,
208 enum exynos_drm_output_type out_type)
209 {
210 struct drm_crtc *crtc;
211
212 drm_for_each_crtc(crtc, drm_dev)
213 if (to_exynos_crtc(crtc)->type == out_type)
214 return to_exynos_crtc(crtc);
215
216 return ERR_PTR(-ENODEV);
217 }
218
exynos_drm_set_possible_crtcs(struct drm_encoder * encoder,enum exynos_drm_output_type out_type)219 int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder,
220 enum exynos_drm_output_type out_type)
221 {
222 struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev,
223 out_type);
224
225 if (IS_ERR(crtc))
226 return PTR_ERR(crtc);
227
228 encoder->possible_crtcs = drm_crtc_mask(&crtc->base);
229
230 return 0;
231 }
232
exynos_drm_crtc_te_handler(struct drm_crtc * crtc)233 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
234 {
235 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
236
237 if (exynos_crtc->ops->te_handler)
238 exynos_crtc->ops->te_handler(exynos_crtc);
239 }
240