power.c revision ff9f4538c09399030fa73e3e65a167852cb91e8f 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16#include <errno.h>
17#include <string.h>
18#include <sys/types.h>
19#include <sys/stat.h>
20#include <sys/socket.h>
21#include <sys/un.h>
22#include <fcntl.h>
23#include <dlfcn.h>
24
25#define LOG_TAG "PowerHAL"
26#include <utils/Log.h>
27
28#include <hardware/hardware.h>
29#include <hardware/power.h>
30
31#define STATE_ON "state=1"
32#define STATE_OFF "state=0"
33#define STATE_HDR_ON "state=2"
34#define STATE_HDR_OFF "state=3"
35
36#define MAX_LENGTH         50
37#define BOOST_SOCKET       "/dev/socket/pb"
38
39static int client_sockfd;
40static struct sockaddr_un client_addr;
41static int last_state = -1;
42
43static void socket_init()
44{
45    if (!client_sockfd) {
46        client_sockfd = socket(PF_UNIX, SOCK_DGRAM, 0);
47        if (client_sockfd < 0) {
48            ALOGE("%s: failed to open: %s", __func__, strerror(errno));
49            return;
50        }
51        memset(&client_addr, 0, sizeof(struct sockaddr_un));
52        client_addr.sun_family = AF_UNIX;
53        snprintf(client_addr.sun_path, UNIX_PATH_MAX, BOOST_SOCKET);
54    }
55}
56
57static void power_init(struct power_module *module)
58{
59    ALOGI("%s", __func__);
60    socket_init();
61}
62
63static void sync_thread(int off)
64{
65    int rc;
66    pid_t client;
67    char data[MAX_LENGTH];
68
69    if (client_sockfd < 0) {
70        ALOGE("%s: boost socket not created", __func__);
71        return;
72    }
73
74    client = getpid();
75
76    if (!off) {
77        snprintf(data, MAX_LENGTH, "2:%d", client);
78        rc = sendto(client_sockfd, data, strlen(data), 0, (const struct sockaddr *)&client_addr, sizeof(struct sockaddr_un));
79    } else {
80        snprintf(data, MAX_LENGTH, "3:%d", client);
81        rc = sendto(client_sockfd, data, strlen(data), 0, (const struct sockaddr *)&client_addr, sizeof(struct sockaddr_un));
82    }
83
84    if (rc < 0) {
85        ALOGE("%s: failed to send: %s", __func__, strerror(errno));
86    }
87}
88
89static void enc_boost(int off)
90{
91    int rc;
92    pid_t client;
93    char data[MAX_LENGTH];
94
95    if (client_sockfd < 0) {
96        ALOGE("%s: boost socket not created", __func__);
97        return;
98    }
99
100    client = getpid();
101
102    if (!off) {
103        snprintf(data, MAX_LENGTH, "5:%d", client);
104        rc = sendto(client_sockfd, data, strlen(data), 0, (const struct sockaddr *)&client_addr, sizeof(struct sockaddr_un));
105    } else {
106        snprintf(data, MAX_LENGTH, "6:%d", client);
107        rc = sendto(client_sockfd, data, strlen(data), 0, (const struct sockaddr *)&client_addr, sizeof(struct sockaddr_un));
108    }
109
110    if (rc < 0) {
111        ALOGE("%s: failed to send: %s", __func__, strerror(errno));
112    }
113}
114
115static void process_video_encode_hint(void *metadata)
116{
117
118    socket_init();
119
120    if (client_sockfd < 0) {
121        ALOGE("%s: boost socket not created", __func__);
122        return;
123    }
124
125    if (metadata) {
126        if (!strncmp(metadata, STATE_ON, sizeof(STATE_ON))) {
127            /* Video encode started */
128            sync_thread(1);
129            enc_boost(1);
130        } else if (!strncmp(metadata, STATE_OFF, sizeof(STATE_OFF))) {
131            /* Video encode stopped */
132            sync_thread(0);
133            enc_boost(0);
134        }  else if (!strncmp(metadata, STATE_HDR_ON, sizeof(STATE_HDR_ON))) {
135            /* HDR usecase started */
136        } else if (!strncmp(metadata, STATE_HDR_OFF, sizeof(STATE_HDR_OFF))) {
137            /* HDR usecase stopped */
138        }else
139            return;
140    } else {
141        return;
142    }
143}
144
145
146static void touch_boost()
147{
148    int rc;
149    pid_t client;
150    char data[MAX_LENGTH];
151
152    if (client_sockfd < 0) {
153        ALOGE("%s: boost socket not created", __func__);
154        return;
155    }
156
157    client = getpid();
158
159    snprintf(data, MAX_LENGTH, "1:%d", client);
160    rc = sendto(client_sockfd, data, strlen(data), 0, (const struct sockaddr *)&client_addr, sizeof(struct sockaddr_un));
161    if (rc < 0) {
162        ALOGE("%s: failed to send: %s", __func__, strerror(errno));
163    }
164}
165
166static void power_set_interactive(struct power_module *module, int on)
167{
168    if (last_state == -1) {
169        last_state = on;
170    } else {
171        if (last_state == on)
172            return;
173        else
174            last_state = on;
175    }
176
177    ALOGV("%s %s", __func__, (on ? "ON" : "OFF"));
178    if (on) {
179        sync_thread(0);
180        touch_boost();
181    } else {
182        sync_thread(1);
183    }
184}
185
186static void power_hint(struct power_module *module, power_hint_t hint,
187                       void *data) {
188    switch (hint) {
189        case POWER_HINT_INTERACTION:
190            ALOGV("POWER_HINT_INTERACTION");
191            touch_boost();
192            break;
193#if 0
194        case POWER_HINT_VSYNC:
195            ALOGV("POWER_HINT_VSYNC %s", (data ? "ON" : "OFF"));
196            break;
197#endif
198        case POWER_HINT_VIDEO_ENCODE:
199            process_video_encode_hint(data);
200            break;
201        default:
202             break;
203    }
204}
205
206static struct hw_module_methods_t power_module_methods = {
207    .open = NULL,
208};
209
210struct power_module HAL_MODULE_INFO_SYM = {
211    .common = {
212        .tag = HARDWARE_MODULE_TAG,
213        .module_api_version = POWER_MODULE_API_VERSION_0_2,
214        .hal_api_version = HARDWARE_HAL_API_VERSION,
215        .id = POWER_HARDWARE_MODULE_ID,
216        .name = "Qualcomm Power HAL",
217        .author = "The Android Open Source Project",
218        .methods = &power_module_methods,
219    },
220
221    .init = power_init,
222    .setInteractive = power_set_interactive,
223    .powerHint = power_hint,
224};
225