1 /*
2 * Copyright (C) 2010 The Android Open Source Project
3 * Copyright (C) 2012-2014, The Linux Foundation. All rights reserved.
4 *
5 * Not a Contribution, Apache license notifications and license are
6 * retained for attribution purposes only.
7
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 #include <cutils/properties.h>
22 #include <utils/Log.h>
23 #include <fcntl.h>
24 #include <sys/ioctl.h>
25 #include <linux/msm_mdp.h>
26 #include <sys/resource.h>
27 #include <sys/prctl.h>
28 #include <poll.h>
29 #include "hwc_utils.h"
30 #include "string.h"
31 #include "external.h"
32 #include "overlay.h"
33 #define __STDC_FORMAT_MACROS 1
34 #include <inttypes.h>
35
36 namespace qhwc {
37
38 #define HWC_VSYNC_THREAD_NAME "hwcVsyncThread"
39 #define MAX_SYSFS_FILE_PATH 255
40 #define PANEL_ON_STR "panel_power_on ="
41 #define ARRAY_LENGTH(array) (sizeof((array))/sizeof((array)[0]))
42 const int MAX_DATA = 64;
43 bool logvsync = false;
44
hwc_vsync_control(hwc_context_t * ctx,int dpy,int enable)45 int hwc_vsync_control(hwc_context_t* ctx, int dpy, int enable)
46 {
47 int ret = 0;
48 if(!ctx->vstate.fakevsync &&
49 ioctl(ctx->dpyAttr[dpy].fd, MSMFB_OVERLAY_VSYNC_CTRL,
50 &enable) < 0) {
51 ALOGE("%s: vsync control failed. Dpy=%d, enable=%d : %s",
52 __FUNCTION__, dpy, enable, strerror(errno));
53 ret = -errno;
54 }
55 return ret;
56 }
57
handle_vsync_event(hwc_context_t * ctx,int dpy,char * data,ssize_t len __unused)58 static void handle_vsync_event(hwc_context_t* ctx, int dpy, char *data,
59 ssize_t len __unused)
60 {
61 // extract timestamp
62 uint64_t timestamp = 0;
63 if (!strncmp(data, "VSYNC=", strlen("VSYNC="))) {
64 timestamp = strtoull(data + strlen("VSYNC="), NULL, 0);
65 }
66 // send timestamp to SurfaceFlinger
67 ALOGD_IF (logvsync, "%s: timestamp %"PRIu64" sent to SF for dpy=%d",
68 __FUNCTION__, timestamp, dpy);
69 ctx->proc->vsync(ctx->proc, dpy, timestamp);
70 }
71
handle_blank_event(hwc_context_t * ctx,int dpy,char * data,ssize_t len __unused)72 static void handle_blank_event(hwc_context_t* ctx, int dpy, char *data,
73 ssize_t len __unused)
74 {
75 if (!strncmp(data, PANEL_ON_STR, strlen(PANEL_ON_STR))) {
76 uint32_t poweron = strtoul(data + strlen(PANEL_ON_STR), NULL, 0);
77 ALOGI("%s: dpy:%d panel power state: %d", __FUNCTION__, dpy, poweron);
78 ctx->dpyAttr[dpy].isActive = poweron ? true: false;
79 }
80 }
81
handle_cec_event(hwc_context_t * ctx,int dpy,char * data,ssize_t len)82 static void handle_cec_event(hwc_context_t* ctx, int dpy, char *data,
83 ssize_t len)
84 {
85 ALOGD("%s: Got CEC event from driver dpy:%d", __FUNCTION__, dpy);
86 ctx->mQService->onCECMessageReceived(data, len);
87 }
88
89 struct event {
90 const char* name;
91 void (*callback)(hwc_context_t* ctx, int dpy, char *data, ssize_t len);
92 };
93
94 struct event event_list[] = {
95 { "vsync_event", handle_vsync_event },
96 { "show_blank_event", handle_blank_event },
97 { "cec/rd_msg", handle_cec_event },
98 };
99
100 #define num_events ARRAY_LENGTH(event_list)
101
vsync_loop(void * param)102 static void *vsync_loop(void *param)
103 {
104 hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param);
105
106 char thread_name[64] = HWC_VSYNC_THREAD_NAME;
107 prctl(PR_SET_NAME, (unsigned long) &thread_name, 0, 0, 0);
108 setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY +
109 android::PRIORITY_MORE_FAVORABLE);
110
111 char vdata[MAX_DATA];
112 //Number of physical displays
113 //We poll on all the nodes.
114 int num_displays = HWC_NUM_DISPLAY_TYPES - 1;
115 struct pollfd pfd[num_displays][num_events];
116
117 char property[PROPERTY_VALUE_MAX];
118 if(property_get("debug.hwc.fakevsync", property, NULL) > 0) {
119 if(atoi(property) == 1)
120 ctx->vstate.fakevsync = true;
121 }
122
123 if(property_get("debug.hwc.logvsync", property, 0) > 0) {
124 if(atoi(property) == 1)
125 logvsync = true;
126 }
127
128 char node_path[MAX_SYSFS_FILE_PATH];
129
130 for (int dpy = HWC_DISPLAY_PRIMARY; dpy < num_displays; dpy++) {
131 for(size_t ev = 0; ev < num_events; ev++) {
132 snprintf(node_path, sizeof(node_path),
133 "/sys/class/graphics/fb%d/%s",
134 dpy == HWC_DISPLAY_PRIMARY ? 0 :
135 overlay::Overlay::getInstance()->
136 getFbForDpy(HWC_DISPLAY_EXTERNAL),
137 event_list[ev].name);
138
139 ALOGI("%s: Reading event %zu for dpy %d from %s", __FUNCTION__,
140 ev, dpy, node_path);
141 pfd[dpy][ev].fd = open(node_path, O_RDONLY);
142
143 if (dpy == HWC_DISPLAY_PRIMARY && pfd[dpy][ev].fd < 0) {
144 // Make sure fb device is opened before starting
145 // this thread so this never happens.
146 ALOGE ("%s:unable to open event node for dpy=%d event=%zu, %s",
147 __FUNCTION__, dpy, ev, strerror(errno));
148 if (ev == 0) {
149 ctx->vstate.fakevsync = true;
150 //XXX: Blank events don't work with fake vsync,
151 //but we shouldn't be running on fake vsync anyway.
152 break;
153 }
154 }
155
156 pread(pfd[dpy][ev].fd, vdata , MAX_DATA, 0);
157 if (pfd[dpy][ev].fd >= 0)
158 pfd[dpy][ev].events = POLLPRI | POLLERR;
159 }
160 }
161
162 if (LIKELY(!ctx->vstate.fakevsync)) {
163 do {
164 int err = poll(*pfd, num_displays * num_events, -1);
165 if(err > 0) {
166 for (int dpy = HWC_DISPLAY_PRIMARY; dpy < num_displays; dpy++) {
167 for(size_t ev = 0; ev < num_events; ev++) {
168 if (pfd[dpy][ev].revents & POLLPRI) {
169 ssize_t len = pread(pfd[dpy][ev].fd, vdata, MAX_DATA, 0);
170 if (UNLIKELY(len < 0)) {
171 // If the read was just interrupted - it is not
172 // a fatal error. Just continue in this case
173 ALOGE ("%s: Unable to read event:%zu for \
174 dpy=%d : %s",
175 __FUNCTION__, ev, dpy, strerror(errno));
176 continue;
177 }
178 event_list[ev].callback(ctx, dpy, vdata, len);
179 }
180 }
181 }
182 } else {
183 ALOGE("%s: poll failed errno: %s", __FUNCTION__,
184 strerror(errno));
185 continue;
186 }
187 } while (true);
188
189 } else {
190
191 //Fake vsync is used only when set explicitly through a property or when
192 //the vsync timestamp node cannot be opened at bootup. There is no
193 //fallback to fake vsync from the true vsync loop, ever, as the
194 //condition can easily escape detection.
195 //Also, fake vsync is delivered only for the primary display.
196 do {
197 usleep(16666);
198 uint64_t timestamp = systemTime();
199 ctx->proc->vsync(ctx->proc, HWC_DISPLAY_PRIMARY, timestamp);
200
201 } while (true);
202 }
203
204 for (int dpy = HWC_DISPLAY_PRIMARY; dpy <= HWC_DISPLAY_EXTERNAL; dpy++ ) {
205 for( size_t event = 0; event < num_events; event++) {
206 if(pfd[dpy][event].fd >= 0)
207 close (pfd[dpy][event].fd);
208 }
209 }
210
211 return NULL;
212 }
213
init_vsync_thread(hwc_context_t * ctx)214 void init_vsync_thread(hwc_context_t* ctx)
215 {
216 int ret;
217 pthread_t vsync_thread;
218 ALOGI("Initializing VSYNC Thread");
219 ret = pthread_create(&vsync_thread, NULL, vsync_loop, (void*) ctx);
220 if (ret) {
221 ALOGE("%s: failed to create %s: %s", __FUNCTION__,
222 HWC_VSYNC_THREAD_NAME, strerror(ret));
223 }
224 }
225
226 }; //namespace
227