1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*/
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_vblank.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include "dcss-dev.h"
#include "dcss-kms.h"
static int dcss_enable_vblank(struct drm_crtc *crtc)
{
struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc,
base);
struct dcss_dev *dcss = crtc->dev->dev_private;
dcss_dtg_vblank_irq_enable(dcss->dtg, true);
dcss_dtg_ctxld_kick_irq_enable(dcss->dtg, true);
enable_irq(dcss_crtc->irq);
return 0;
}
static void dcss_disable_vblank(struct drm_crtc *crtc)
{
struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc,
base);
struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private;
disable_irq_nosync(dcss_crtc->irq);
dcss_dtg_vblank_irq_enable(dcss->dtg, false);
if (dcss_crtc->disable_ctxld_kick_irq)
dcss_dtg_ctxld_kick_irq_enable(dcss->dtg, false);
}
static const struct drm_crtc_funcs dcss_crtc_funcs = {
.set_config = drm_atomic_helper_set_config,
.destroy = drm_crtc_cleanup,
.page_flip = drm_atomic_helper_page_flip,
.reset = drm_atomic_helper_crtc_reset,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.enable_vblank = dcss_enable_vblank,
.disable_vblank = dcss_disable_vblank,
};
static void dcss_crtc_atomic_begin(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
drm_crtc_vblank_on(crtc);
}
static void dcss_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc,
base);
struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private;
spin_lock_irq(&crtc->dev->event_lock);
if (crtc->state->event) {
WARN_ON(drm_crtc_vblank_get(crtc));
drm_crtc_arm_vblank_event(crtc, crtc->state->event);
crtc->state->event = NULL;
}
spin_unlock_irq(&crtc->dev->event_lock);
if (dcss_dtg_is_enabled(dcss->dtg))
dcss_ctxld_enable(dcss->ctxld);
}
static void dcss_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state,
crtc);
struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc,
base);
struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private;
struct drm_display_mode *mode = &crtc->state->adjusted_mode;
struct drm_display_mode *old_mode = &old_crtc_state->adjusted_mode;
struct videomode vm;
drm_display_mode_to_videomode(mode, &vm);
pm_runtime_get_sync(dcss->dev);
vm.pixelclock = mode->crtc_clock * 1000;
dcss_ss_subsam_set(dcss->ss);
dcss_dtg_css_set(dcss->dtg);
if (!drm_mode_equal(mode, old_mode) || !old_crtc_state->active) {
dcss_dtg_sync_set(dcss->dtg, &vm);
dcss_ss_sync_set(dcss->ss, &vm,
mode->flags & DRM_MODE_FLAG_PHSYNC,
mode->flags & DRM_MODE_FLAG_PVSYNC);
}
dcss_enable_dtg_and_ss(dcss);
dcss_ctxld_enable(dcss->ctxld);
/* Allow CTXLD kick interrupt to be disabled when VBLANK is disabled. */
dcss_crtc->disable_ctxld_kick_irq = true;
}
static void dcss_crtc_atomic_disable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state,
crtc);
struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc,
base);
struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private;
struct drm_display_mode *mode = &crtc->state->adjusted_mode;
struct drm_display_mode *old_mode = &old_crtc_state->adjusted_mode;
drm_atomic_helper_disable_planes_on_crtc(old_crtc_state, false);
spin_lock_irq(&crtc->dev->event_lock);
if (crtc->state->event) {
drm_crtc_send_vblank_event(crtc, crtc->state->event);
crtc->state->event = NULL;
}
spin_unlock_irq(&crtc->dev->event_lock);
dcss_dtg_ctxld_kick_irq_enable(dcss->dtg, true);
reinit_completion(&dcss->disable_completion);
dcss_disable_dtg_and_ss(dcss);
dcss_ctxld_enable(dcss->ctxld);
if (!drm_mode_equal(mode, old_mode) || !crtc->state->active)
if (!wait_for_completion_timeout(&dcss->disable_completion,
msecs_to_jiffies(100)))
dev_err(dcss->dev, "Shutting off DTG timed out.\n");
/*
* Do not shut off CTXLD kick interrupt when shutting VBLANK off. It
* will be needed to commit the last changes, before going to suspend.
*/
dcss_crtc->disable_ctxld_kick_irq = false;
drm_crtc_vblank_off(crtc);
pm_runtime_mark_last_busy(dcss->dev);
pm_runtime_put_autosuspend(dcss->dev);
}
static const struct drm_crtc_helper_funcs dcss_helper_funcs = {
.atomic_begin = dcss_crtc_atomic_begin,
.atomic_flush = dcss_crtc_atomic_flush,
.atomic_enable = dcss_crtc_atomic_enable,
.atomic_disable = dcss_crtc_atomic_disable,
};
static irqreturn_t dcss_crtc_irq_handler(int irq, void *dev_id)
{
struct dcss_crtc *dcss_crtc = dev_id;
struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private;
if (!dcss_dtg_vblank_irq_valid(dcss->dtg))
return IRQ_NONE;
if (dcss_ctxld_is_flushed(dcss->ctxld))
drm_crtc_handle_vblank(&dcss_crtc->base);
dcss_dtg_vblank_irq_clear(dcss->dtg);
return IRQ_HANDLED;
}
int dcss_crtc_init(struct dcss_crtc *crtc, struct drm_device *drm)
{
struct dcss_dev *dcss = drm->dev_private;
struct platform_device *pdev = to_platform_device(dcss->dev);
int ret;
crtc->plane[0] = dcss_plane_init(drm, drm_crtc_mask(&crtc->base),
DRM_PLANE_TYPE_PRIMARY, 0);
if (IS_ERR(crtc->plane[0]))
return PTR_ERR(crtc->plane[0]);
crtc->base.port = dcss->of_port;
drm_crtc_helper_add(&crtc->base, &dcss_helper_funcs);
ret = drm_crtc_init_with_planes(drm, &crtc->base, &crtc->plane[0]->base,
NULL, &dcss_crtc_funcs, NULL);
if (ret) {
dev_err(dcss->dev, "failed to init crtc\n");
return ret;
}
crtc->irq = platform_get_irq_byname(pdev, "vblank");
if (crtc->irq < 0)
return crtc->irq;
ret = request_irq(crtc->irq, dcss_crtc_irq_handler,
0, "dcss_drm", crtc);
if (ret) {
dev_err(dcss->dev, "irq request failed with %d.\n", ret);
return ret;
}
disable_irq(crtc->irq);
return 0;
}
void dcss_crtc_deinit(struct dcss_crtc *crtc, struct drm_device *drm)
{
free_irq(crtc->irq, crtc);
}
|
