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 spin_lock_irq(&crtc->dev->event_lock);
43 if (crtc->state->event && !crtc->state->active) {
44 drm_crtc_send_vblank_event(crtc, crtc->state->event);
45 crtc->state->event = NULL;
46 }
47 spin_unlock_irq(&crtc->dev->event_lock);
48 }
49
exynos_crtc_atomic_check(struct drm_crtc * crtc,struct drm_atomic_state * state)50 static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
51 struct drm_atomic_state *state)
52 {
53 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
54 crtc);
55 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
56
57 if (!crtc_state->enable)
58 return 0;
59
60 if (exynos_crtc->ops->atomic_check)
61 return exynos_crtc->ops->atomic_check(exynos_crtc, crtc_state);
62
63 return 0;
64 }
65
exynos_crtc_atomic_begin(struct drm_crtc * crtc,struct drm_atomic_state * state)66 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
67 struct drm_atomic_state *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
exynos_crtc_atomic_flush(struct drm_crtc * crtc,struct drm_atomic_state * state)75 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
76 struct drm_atomic_state *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
exynos_crtc_mode_valid(struct drm_crtc * crtc,const struct drm_display_mode * mode)84 static enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc,
85 const struct drm_display_mode *mode)
86 {
87 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
88
89 if (exynos_crtc->ops->mode_valid)
90 return exynos_crtc->ops->mode_valid(exynos_crtc, mode);
91
92 return MODE_OK;
93 }
94
exynos_crtc_mode_fixup(struct drm_crtc * crtc,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)95 static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc,
96 const struct drm_display_mode *mode,
97 struct drm_display_mode *adjusted_mode)
98 {
99 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
100
101 if (exynos_crtc->ops->mode_fixup)
102 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode,
103 adjusted_mode);
104
105 return true;
106 }
107
108
109 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
110 .mode_valid = exynos_crtc_mode_valid,
111 .mode_fixup = exynos_crtc_mode_fixup,
112 .atomic_check = exynos_crtc_atomic_check,
113 .atomic_begin = exynos_crtc_atomic_begin,
114 .atomic_flush = exynos_crtc_atomic_flush,
115 .atomic_enable = exynos_drm_crtc_atomic_enable,
116 .atomic_disable = exynos_drm_crtc_atomic_disable,
117 };
118
exynos_crtc_handle_event(struct exynos_drm_crtc * exynos_crtc)119 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc)
120 {
121 struct drm_crtc *crtc = &exynos_crtc->base;
122 struct drm_pending_vblank_event *event = crtc->state->event;
123 unsigned long flags;
124
125 if (!event)
126 return;
127 crtc->state->event = NULL;
128
129 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
130
131 spin_lock_irqsave(&crtc->dev->event_lock, flags);
132 drm_crtc_arm_vblank_event(crtc, event);
133 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
134 }
135
exynos_drm_crtc_destroy(struct drm_crtc * crtc)136 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
137 {
138 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
139
140 drm_crtc_cleanup(crtc);
141 kfree(exynos_crtc);
142 }
143
exynos_drm_crtc_enable_vblank(struct drm_crtc * crtc)144 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc)
145 {
146 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
147
148 if (exynos_crtc->ops->enable_vblank)
149 return exynos_crtc->ops->enable_vblank(exynos_crtc);
150
151 return 0;
152 }
153
exynos_drm_crtc_disable_vblank(struct drm_crtc * crtc)154 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
155 {
156 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
157
158 if (exynos_crtc->ops->disable_vblank)
159 exynos_crtc->ops->disable_vblank(exynos_crtc);
160 }
161
162 static const struct drm_crtc_funcs exynos_crtc_funcs = {
163 .set_config = drm_atomic_helper_set_config,
164 .page_flip = drm_atomic_helper_page_flip,
165 .destroy = exynos_drm_crtc_destroy,
166 .reset = drm_atomic_helper_crtc_reset,
167 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
168 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
169 .enable_vblank = exynos_drm_crtc_enable_vblank,
170 .disable_vblank = exynos_drm_crtc_disable_vblank,
171 };
172
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)173 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
174 struct drm_plane *plane,
175 enum exynos_drm_output_type type,
176 const struct exynos_drm_crtc_ops *ops,
177 void *ctx)
178 {
179 struct exynos_drm_crtc *exynos_crtc;
180 struct drm_crtc *crtc;
181 int ret;
182
183 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
184 if (!exynos_crtc)
185 return ERR_PTR(-ENOMEM);
186
187 exynos_crtc->type = type;
188 exynos_crtc->ops = ops;
189 exynos_crtc->ctx = ctx;
190
191 crtc = &exynos_crtc->base;
192
193 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
194 &exynos_crtc_funcs, NULL);
195 if (ret < 0)
196 goto err_crtc;
197
198 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
199
200 return exynos_crtc;
201
202 err_crtc:
203 plane->funcs->destroy(plane);
204 kfree(exynos_crtc);
205 return ERR_PTR(ret);
206 }
207
exynos_drm_crtc_get_by_type(struct drm_device * drm_dev,enum exynos_drm_output_type out_type)208 struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev,
209 enum exynos_drm_output_type out_type)
210 {
211 struct drm_crtc *crtc;
212
213 drm_for_each_crtc(crtc, drm_dev)
214 if (to_exynos_crtc(crtc)->type == out_type)
215 return to_exynos_crtc(crtc);
216
217 return ERR_PTR(-ENODEV);
218 }
219
exynos_drm_set_possible_crtcs(struct drm_encoder * encoder,enum exynos_drm_output_type out_type)220 int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder,
221 enum exynos_drm_output_type out_type)
222 {
223 struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev,
224 out_type);
225
226 if (IS_ERR(crtc))
227 return PTR_ERR(crtc);
228
229 encoder->possible_crtcs = drm_crtc_mask(&crtc->base);
230
231 return 0;
232 }
233
exynos_drm_crtc_te_handler(struct drm_crtc * crtc)234 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
235 {
236 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
237
238 if (exynos_crtc->ops->te_handler)
239 exynos_crtc->ops->te_handler(exynos_crtc);
240 }
241