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
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/* Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#define pr_fmt(fmt) "[drm:%s:%d]: " fmt, __func__, __LINE__
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/string.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/of_platform.h>
#include "dpu_power_handle.h"
#include "dpu_trace.h"
static const char *data_bus_name[DPU_POWER_HANDLE_DBUS_ID_MAX] = {
[DPU_POWER_HANDLE_DBUS_ID_MNOC] = "qcom,dpu-data-bus",
[DPU_POWER_HANDLE_DBUS_ID_LLCC] = "qcom,dpu-llcc-bus",
[DPU_POWER_HANDLE_DBUS_ID_EBI] = "qcom,dpu-ebi-bus",
};
const char *dpu_power_handle_get_dbus_name(u32 bus_id)
{
if (bus_id < DPU_POWER_HANDLE_DBUS_ID_MAX)
return data_bus_name[bus_id];
return NULL;
}
static void dpu_power_event_trigger_locked(struct dpu_power_handle *phandle,
u32 event_type)
{
struct dpu_power_event *event;
list_for_each_entry(event, &phandle->event_list, list) {
if (event->event_type & event_type)
event->cb_fnc(event_type, event->usr);
}
}
struct dpu_power_client *dpu_power_client_create(
struct dpu_power_handle *phandle, char *client_name)
{
struct dpu_power_client *client;
static u32 id;
if (!client_name || !phandle) {
pr_err("client name is null or invalid power data\n");
return ERR_PTR(-EINVAL);
}
client = kzalloc(sizeof(struct dpu_power_client), GFP_KERNEL);
if (!client)
return ERR_PTR(-ENOMEM);
mutex_lock(&phandle->phandle_lock);
strlcpy(client->name, client_name, MAX_CLIENT_NAME_LEN);
client->usecase_ndx = VOTE_INDEX_DISABLE;
client->id = id;
client->active = true;
pr_debug("client %s created:%pK id :%d\n", client_name,
client, id);
id++;
list_add(&client->list, &phandle->power_client_clist);
mutex_unlock(&phandle->phandle_lock);
return client;
}
void dpu_power_client_destroy(struct dpu_power_handle *phandle,
struct dpu_power_client *client)
{
if (!client || !phandle) {
pr_err("reg bus vote: invalid client handle\n");
} else if (!client->active) {
pr_err("dpu power deinit already done\n");
kfree(client);
} else {
pr_debug("bus vote client %s destroyed:%pK id:%u\n",
client->name, client, client->id);
mutex_lock(&phandle->phandle_lock);
list_del_init(&client->list);
mutex_unlock(&phandle->phandle_lock);
kfree(client);
}
}
void dpu_power_resource_init(struct platform_device *pdev,
struct dpu_power_handle *phandle)
{
phandle->dev = &pdev->dev;
INIT_LIST_HEAD(&phandle->power_client_clist);
INIT_LIST_HEAD(&phandle->event_list);
mutex_init(&phandle->phandle_lock);
}
void dpu_power_resource_deinit(struct platform_device *pdev,
struct dpu_power_handle *phandle)
{
struct dpu_power_client *curr_client, *next_client;
struct dpu_power_event *curr_event, *next_event;
if (!phandle || !pdev) {
pr_err("invalid input param\n");
return;
}
mutex_lock(&phandle->phandle_lock);
list_for_each_entry_safe(curr_client, next_client,
&phandle->power_client_clist, list) {
pr_err("client:%s-%d still registered with refcount:%d\n",
curr_client->name, curr_client->id,
curr_client->refcount);
curr_client->active = false;
list_del(&curr_client->list);
}
list_for_each_entry_safe(curr_event, next_event,
&phandle->event_list, list) {
pr_err("event:%d, client:%s still registered\n",
curr_event->event_type,
curr_event->client_name);
curr_event->active = false;
list_del(&curr_event->list);
}
mutex_unlock(&phandle->phandle_lock);
}
int dpu_power_resource_enable(struct dpu_power_handle *phandle,
struct dpu_power_client *pclient, bool enable)
{
bool changed = false;
u32 max_usecase_ndx = VOTE_INDEX_DISABLE, prev_usecase_ndx;
struct dpu_power_client *client;
u32 event_type;
if (!phandle || !pclient) {
pr_err("invalid input argument\n");
return -EINVAL;
}
mutex_lock(&phandle->phandle_lock);
if (enable)
pclient->refcount++;
else if (pclient->refcount)
pclient->refcount--;
if (pclient->refcount)
pclient->usecase_ndx = VOTE_INDEX_LOW;
else
pclient->usecase_ndx = VOTE_INDEX_DISABLE;
list_for_each_entry(client, &phandle->power_client_clist, list) {
if (client->usecase_ndx < VOTE_INDEX_MAX &&
client->usecase_ndx > max_usecase_ndx)
max_usecase_ndx = client->usecase_ndx;
}
if (phandle->current_usecase_ndx != max_usecase_ndx) {
changed = true;
prev_usecase_ndx = phandle->current_usecase_ndx;
phandle->current_usecase_ndx = max_usecase_ndx;
}
pr_debug("%pS: changed=%d current idx=%d request client %s id:%u enable:%d refcount:%d\n",
__builtin_return_address(0), changed, max_usecase_ndx,
pclient->name, pclient->id, enable, pclient->refcount);
if (!changed)
goto end;
event_type = enable ? DPU_POWER_EVENT_ENABLE : DPU_POWER_EVENT_DISABLE;
dpu_power_event_trigger_locked(phandle, event_type);
end:
mutex_unlock(&phandle->phandle_lock);
return 0;
}
struct dpu_power_event *dpu_power_handle_register_event(
struct dpu_power_handle *phandle,
u32 event_type, void (*cb_fnc)(u32 event_type, void *usr),
void *usr, char *client_name)
{
struct dpu_power_event *event;
if (!phandle) {
pr_err("invalid power handle\n");
return ERR_PTR(-EINVAL);
} else if (!cb_fnc || !event_type) {
pr_err("no callback fnc or event type\n");
return ERR_PTR(-EINVAL);
}
event = kzalloc(sizeof(struct dpu_power_event), GFP_KERNEL);
if (!event)
return ERR_PTR(-ENOMEM);
event->event_type = event_type;
event->cb_fnc = cb_fnc;
event->usr = usr;
strlcpy(event->client_name, client_name, MAX_CLIENT_NAME_LEN);
event->active = true;
mutex_lock(&phandle->phandle_lock);
list_add(&event->list, &phandle->event_list);
mutex_unlock(&phandle->phandle_lock);
return event;
}
void dpu_power_handle_unregister_event(
struct dpu_power_handle *phandle,
struct dpu_power_event *event)
{
if (!phandle || !event) {
pr_err("invalid phandle or event\n");
} else if (!event->active) {
pr_err("power handle deinit already done\n");
kfree(event);
} else {
mutex_lock(&phandle->phandle_lock);
list_del_init(&event->list);
mutex_unlock(&phandle->phandle_lock);
kfree(event);
}
}
|
