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_atomic_state * state)21 static void exynos_drm_crtc_atomic_enable(struct drm_crtc *crtc,
22 struct drm_atomic_state *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_atomic_state * state)32 static void exynos_drm_crtc_atomic_disable(struct drm_crtc *crtc,
33 struct drm_atomic_state *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_atomic_state * state)51 static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
52 struct drm_atomic_state *state)
53 {
54 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
55 crtc);
56 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
57
58 if (!crtc_state->enable)
59 return 0;
60
61 if (exynos_crtc->ops->atomic_check)
62 return exynos_crtc->ops->atomic_check(exynos_crtc, crtc_state);
63
64 return 0;
65 }
66
exynos_crtc_atomic_begin(struct drm_crtc * crtc,struct drm_atomic_state * state)67 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
68 struct drm_atomic_state *state)
69 {
70 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
71
72 if (exynos_crtc->ops->atomic_begin)
73 exynos_crtc->ops->atomic_begin(exynos_crtc);
74 }
75
exynos_crtc_atomic_flush(struct drm_crtc * crtc,struct drm_atomic_state * state)76 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
77 struct drm_atomic_state *state)
78 {
79 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
80
81 if (exynos_crtc->ops->atomic_flush)
82 exynos_crtc->ops->atomic_flush(exynos_crtc);
83 }
84
exynos_crtc_mode_valid(struct drm_crtc * crtc,const struct drm_display_mode * mode)85 static enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc,
86 const struct drm_display_mode *mode)
87 {
88 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
89
90 if (exynos_crtc->ops->mode_valid)
91 return exynos_crtc->ops->mode_valid(exynos_crtc, mode);
92
93 return MODE_OK;
94 }
95
exynos_crtc_mode_fixup(struct drm_crtc * crtc,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)96 static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc,
97 const struct drm_display_mode *mode,
98 struct drm_display_mode *adjusted_mode)
99 {
100 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
101
102 if (exynos_crtc->ops->mode_fixup)
103 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode,
104 adjusted_mode);
105
106 return true;
107 }
108
109
110 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
111 .mode_valid = exynos_crtc_mode_valid,
112 .mode_fixup = exynos_crtc_mode_fixup,
113 .atomic_check = exynos_crtc_atomic_check,
114 .atomic_begin = exynos_crtc_atomic_begin,
115 .atomic_flush = exynos_crtc_atomic_flush,
116 .atomic_enable = exynos_drm_crtc_atomic_enable,
117 .atomic_disable = exynos_drm_crtc_atomic_disable,
118 };
119
exynos_crtc_handle_event(struct exynos_drm_crtc * exynos_crtc)120 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc)
121 {
122 struct drm_crtc *crtc = &exynos_crtc->base;
123 struct drm_pending_vblank_event *event = crtc->state->event;
124 unsigned long flags;
125
126 if (!event)
127 return;
128 crtc->state->event = NULL;
129
130 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
131
132 spin_lock_irqsave(&crtc->dev->event_lock, flags);
133 drm_crtc_arm_vblank_event(crtc, event);
134 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
135 }
136
exynos_drm_crtc_destroy(struct drm_crtc * crtc)137 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
138 {
139 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
140
141 drm_crtc_cleanup(crtc);
142 kfree(exynos_crtc);
143 }
144
exynos_drm_crtc_enable_vblank(struct drm_crtc * crtc)145 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc)
146 {
147 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
148
149 if (exynos_crtc->ops->enable_vblank)
150 return exynos_crtc->ops->enable_vblank(exynos_crtc);
151
152 return 0;
153 }
154
exynos_drm_crtc_disable_vblank(struct drm_crtc * crtc)155 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
156 {
157 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
158
159 if (exynos_crtc->ops->disable_vblank)
160 exynos_crtc->ops->disable_vblank(exynos_crtc);
161 }
162
163 static const struct drm_crtc_funcs exynos_crtc_funcs = {
164 .set_config = drm_atomic_helper_set_config,
165 .page_flip = drm_atomic_helper_page_flip,
166 .destroy = exynos_drm_crtc_destroy,
167 .reset = drm_atomic_helper_crtc_reset,
168 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
169 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
170 .enable_vblank = exynos_drm_crtc_enable_vblank,
171 .disable_vblank = exynos_drm_crtc_disable_vblank,
172 };
173
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)174 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
175 struct drm_plane *plane,
176 enum exynos_drm_output_type type,
177 const struct exynos_drm_crtc_ops *ops,
178 void *ctx)
179 {
180 struct exynos_drm_crtc *exynos_crtc;
181 struct drm_crtc *crtc;
182 int ret;
183
184 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
185 if (!exynos_crtc)
186 return ERR_PTR(-ENOMEM);
187
188 exynos_crtc->type = type;
189 exynos_crtc->ops = ops;
190 exynos_crtc->ctx = ctx;
191
192 crtc = &exynos_crtc->base;
193
194 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
195 &exynos_crtc_funcs, NULL);
196 if (ret < 0)
197 goto err_crtc;
198
199 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
200
201 return exynos_crtc;
202
203 err_crtc:
204 plane->funcs->destroy(plane);
205 kfree(exynos_crtc);
206 return ERR_PTR(ret);
207 }
208
exynos_drm_crtc_get_by_type(struct drm_device * drm_dev,enum exynos_drm_output_type out_type)209 struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev,
210 enum exynos_drm_output_type out_type)
211 {
212 struct drm_crtc *crtc;
213
214 drm_for_each_crtc(crtc, drm_dev)
215 if (to_exynos_crtc(crtc)->type == out_type)
216 return to_exynos_crtc(crtc);
217
218 return ERR_PTR(-ENODEV);
219 }
220
exynos_drm_set_possible_crtcs(struct drm_encoder * encoder,enum exynos_drm_output_type out_type)221 int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder,
222 enum exynos_drm_output_type out_type)
223 {
224 struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev,
225 out_type);
226
227 if (IS_ERR(crtc))
228 return PTR_ERR(crtc);
229
230 encoder->possible_crtcs = drm_crtc_mask(&crtc->base);
231
232 return 0;
233 }
234
exynos_drm_crtc_te_handler(struct drm_crtc * crtc)235 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
236 {
237 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
238
239 if (exynos_crtc->ops->te_handler)
240 exynos_crtc->ops->te_handler(exynos_crtc);
241 }
242