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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2019-2020, The Linux Foundation. All rights reserved.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/of_platform.h>
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/sched.h>
#include <drm/drm_panel.h>
#include "msm_drv.h"
#include "sde_dbg.h"
struct msm_display_fps_info {
uint32_t id;
enum fps fps;
struct list_head list;
struct drm_panel *panel;
};
static int msm_notifier_fps_chg_callback(struct notifier_block *nb,
unsigned long val, void *data);
static struct notifier_block msm_notifier_block = {
.notifier_call = msm_notifier_fps_chg_callback,
};
struct notifier_info {
struct notifier_block notifier;
};
struct display_list {
struct list_head list;
enum fps max_fps;
};
static struct display_list *active_displays;
static int msm_notifier_fps_chg_callback(struct notifier_block *nb,
unsigned long val, void *data)
{
int fps;
enum fps sched_fps, max_fps;
struct drm_panel_notifier *notifier_data =
(struct drm_panel_notifier *) data;
struct msm_display_fps_info *display;
bool display_id_match = false;
/*
* Get ceiling of fps from notifier data to pass to scheduler.
* Default will be FPS60 and sent to scheduler during suspend.
*/
fps = notifier_data->refresh_rate;
if (fps > FPS120)
sched_fps = FPS144;
else if (fps > FPS90)
sched_fps = FPS120;
else if (fps > FPS60)
sched_fps = FPS90;
else if (fps > FPS48)
sched_fps = FPS60;
else if (fps > FPS30)
sched_fps = FPS48;
else if (fps > FPS0)
sched_fps = FPS30;
else
sched_fps = FPS60;
max_fps = sched_fps;
/*
* Iterate displays and set id and fps if uninitialized.
* Update display's current fps if id match is found.
* Find max refresh rate to pass to scheduler.
*/
list_for_each_entry(display, &active_displays->list, list) {
if (!display->fps && !display_id_match) {
display->id = notifier_data->id;
display->fps = sched_fps;
}
if (display->id == notifier_data->id) {
display_id_match = true;
display->fps = sched_fps;
}
if (display->fps > max_fps)
max_fps = display->fps;
}
if (max_fps != active_displays->max_fps) {
SDE_EVT32(notifier_data->id,
notifier_data->refresh_rate, max_fps);
active_displays->max_fps = max_fps;
sched_set_refresh_rate(max_fps);
}
return 0;
}
static int msm_notifier_remove(struct platform_device *pdev)
{
struct msm_display_fps_info *display;
struct notifier_info *info = platform_get_drvdata(pdev);
list_for_each_entry(display, &active_displays->list, list)
drm_panel_notifier_unregister(display->panel, &info->notifier);
return 0;
}
static int msm_notifier_probe(struct platform_device *pdev)
{
int i, count, ret = 0;
struct device_node *node;
struct drm_panel *panel;
struct notifier_info *info = NULL;
struct msm_display_fps_info *display;
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->notifier = msm_notifier_block;
platform_set_drvdata(pdev, info);
active_displays = devm_kzalloc(&pdev->dev,
sizeof(*active_displays), GFP_KERNEL);
if (!active_displays) {
ret = -ENOMEM;
goto end;
}
INIT_LIST_HEAD(&active_displays->list);
/* Set default max fps to 0 */
active_displays->max_fps = 0;
count = of_count_phandle_with_args(pdev->dev.of_node, "panel", NULL);
for (i = 0; i < count; i++) {
node = of_parse_phandle(pdev->dev.of_node, "panel", i);
panel = of_drm_find_panel(node);
of_node_put(node);
if (!IS_ERR(panel)) {
/*
* Add new msm_display_fps_info to linked list
* of active displays. Initialize fps as
* 0 to mark unassigned node. Assign when
* you get the first callback for that display
*/
struct msm_display_fps_info *display_fps_info =
devm_kzalloc(&pdev->dev,
sizeof(*display_fps_info), GFP_KERNEL);
if (!display_fps_info) {
ret = -ENOMEM;
goto fail;
}
display_fps_info->panel = panel;
list_add(&display_fps_info->list,
&active_displays->list);
drm_panel_notifier_register(panel, &info->notifier);
}
}
pr_info("msm notifier probed successfully\n");
return ret;
fail:
list_for_each_entry(display, &active_displays->list, list)
drm_panel_notifier_unregister(display->panel, &info->notifier);
devm_kfree(&pdev->dev, active_displays);
end:
devm_kfree(&pdev->dev, info);
return ret;
}
static const struct of_device_id dt_match_msm_notifier[] = {
{ .compatible = "qcom,msm-notifier"},
{},
};
MODULE_DEVICE_TABLE(of, dt_match_msm_notifier);
static struct platform_driver msm_notifier_platform_driver = {
.probe = msm_notifier_probe,
.remove = msm_notifier_remove,
.driver = {
.name = "msm_notifier",
.of_match_table = dt_match_msm_notifier,
.suppress_bind_attrs = true,
},
};
int __init msm_notifier_register(void)
{
return platform_driver_register(&msm_notifier_platform_driver);
}
void __exit msm_notifier_unregister(void)
{
platform_driver_unregister(&msm_notifier_platform_driver);
}
#ifndef CONFIG_DRM_MSM_MODULE
late_initcall(msm_notifier_register);
module_exit(msm_notifier_unregister);
#endif
|
