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