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 #include <inttypes.h> 34 35 namespace qhwc { 36 37 #define HWC_VSYNC_THREAD_NAME "hwcVsyncThread" 38 #define MAX_SYSFS_FILE_PATH 255 39 #define PANEL_ON_STR "panel_power_on =" 40 #define ARRAY_LENGTH(array) (sizeof((array))/sizeof((array)[0])) 41 const int MAX_DATA = 64; 42 bool logvsync = false; 43 44 int hwc_vsync_control(hwc_context_t* ctx, int dpy, int enable) 45 { 46 int ret = 0; 47 if(!ctx->vstate.fakevsync && 48 ioctl(ctx->dpyAttr[dpy].fd, MSMFB_OVERLAY_VSYNC_CTRL, 49 &enable) < 0) { 50 ALOGE("%s: vsync control failed. Dpy=%d, enable=%d : %s", 51 __FUNCTION__, dpy, enable, strerror(errno)); 52 ret = -errno; 53 } 54 return ret; 55 } 56 57 static void handle_vsync_event(hwc_context_t* ctx, int dpy, char *data, 58 ssize_t len __unused) 59 { 60 // extract timestamp 61 uint64_t timestamp = 0; 62 if (!strncmp(data, "VSYNC=", strlen("VSYNC="))) { 63 timestamp = strtoull(data + strlen("VSYNC="), NULL, 0); 64 } 65 // send timestamp to SurfaceFlinger 66 ALOGD_IF (logvsync, "%s: timestamp %" PRIu64 " sent to SF for dpy=%d", 67 __FUNCTION__, timestamp, dpy); 68 ctx->proc->vsync(ctx->proc, dpy, timestamp); 69 } 70 71 static void handle_blank_event(hwc_context_t* ctx, int dpy, char *data, 72 ssize_t len __unused) 73 { 74 if (!strncmp(data, PANEL_ON_STR, strlen(PANEL_ON_STR))) { 75 uint32_t poweron = strtoul(data + strlen(PANEL_ON_STR), NULL, 0); 76 ALOGI("%s: dpy:%d panel power state: %d", __FUNCTION__, dpy, poweron); 77 ctx->dpyAttr[dpy].isActive = poweron ? true: false; 78 } 79 } 80 81 static void handle_cec_event(hwc_context_t* ctx, int dpy, char *data, 82 ssize_t len) 83 { 84 ALOGD("%s: Got CEC event from driver dpy:%d", __FUNCTION__, dpy); 85 ctx->mQService->onCECMessageReceived(data, len); 86 } 87 88 struct event { 89 const char* name; 90 void (*callback)(hwc_context_t* ctx, int dpy, char *data, ssize_t len); 91 }; 92 93 struct event event_list[] = { 94 { "vsync_event", handle_vsync_event }, 95 { "show_blank_event", handle_blank_event }, 96 { "cec/rd_msg", handle_cec_event }, 97 }; 98 99 #define num_events ARRAY_LENGTH(event_list) 100 101 static void *vsync_loop(void *param) 102 { 103 hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param); 104 105 char thread_name[64] = HWC_VSYNC_THREAD_NAME; 106 prctl(PR_SET_NAME, (unsigned long) &thread_name, 0, 0, 0); 107 setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY + 108 android::PRIORITY_MORE_FAVORABLE); 109 110 char vdata[MAX_DATA]; 111 //Number of physical displays 112 //We poll on all the nodes. 113 int num_displays = HWC_NUM_DISPLAY_TYPES - 1; 114 struct pollfd pfd[num_displays][num_events]; 115 116 char property[PROPERTY_VALUE_MAX]; 117 if(property_get("debug.hwc.fakevsync", property, NULL) > 0) { 118 if(atoi(property) == 1) 119 ctx->vstate.fakevsync = true; 120 } 121 122 if(property_get("debug.hwc.logvsync", property, 0) > 0) { 123 if(atoi(property) == 1) 124 logvsync = true; 125 } 126 127 char node_path[MAX_SYSFS_FILE_PATH]; 128 129 for (int dpy = HWC_DISPLAY_PRIMARY; dpy < num_displays; dpy++) { 130 for(size_t ev = 0; ev < num_events; ev++) { 131 snprintf(node_path, sizeof(node_path), 132 "/sys/class/graphics/fb%d/%s", 133 dpy == HWC_DISPLAY_PRIMARY ? 0 : 134 overlay::Overlay::getInstance()-> 135 getFbForDpy(HWC_DISPLAY_EXTERNAL), 136 event_list[ev].name); 137 138 ALOGI("%s: Reading event %zu for dpy %d from %s", __FUNCTION__, 139 ev, dpy, node_path); 140 pfd[dpy][ev].fd = open(node_path, O_RDONLY); 141 142 if (dpy == HWC_DISPLAY_PRIMARY && pfd[dpy][ev].fd < 0) { 143 // Make sure fb device is opened before starting 144 // this thread so this never happens. 145 ALOGE ("%s:unable to open event node for dpy=%d event=%zu, %s", 146 __FUNCTION__, dpy, ev, strerror(errno)); 147 if (ev == 0) { 148 ctx->vstate.fakevsync = true; 149 //XXX: Blank events don't work with fake vsync, 150 //but we shouldn't be running on fake vsync anyway. 151 break; 152 } 153 } 154 155 pread(pfd[dpy][ev].fd, vdata , MAX_DATA, 0); 156 if (pfd[dpy][ev].fd >= 0) 157 pfd[dpy][ev].events = POLLPRI | POLLERR; 158 } 159 } 160 161 if (LIKELY(!ctx->vstate.fakevsync)) { 162 do { 163 int err = poll(*pfd, num_displays * num_events, -1); 164 if(err > 0) { 165 for (int dpy = HWC_DISPLAY_PRIMARY; dpy < num_displays; dpy++) { 166 for(size_t ev = 0; ev < num_events; ev++) { 167 if (pfd[dpy][ev].revents & POLLPRI) { 168 ssize_t len = pread(pfd[dpy][ev].fd, vdata, MAX_DATA, 0); 169 if (UNLIKELY(len < 0)) { 170 // If the read was just interrupted - it is not 171 // a fatal error. Just continue in this case 172 ALOGE ("%s: Unable to read event:%zu for \ 173 dpy=%d : %s", 174 __FUNCTION__, ev, dpy, strerror(errno)); 175 continue; 176 } 177 event_list[ev].callback(ctx, dpy, vdata, len); 178 } 179 } 180 } 181 } else { 182 ALOGE("%s: poll failed errno: %s", __FUNCTION__, 183 strerror(errno)); 184 continue; 185 } 186 } while (true); 187 188 } else { 189 190 //Fake vsync is used only when set explicitly through a property or when 191 //the vsync timestamp node cannot be opened at bootup. There is no 192 //fallback to fake vsync from the true vsync loop, ever, as the 193 //condition can easily escape detection. 194 //Also, fake vsync is delivered only for the primary display. 195 do { 196 usleep(16666); 197 uint64_t timestamp = systemTime(); 198 ctx->proc->vsync(ctx->proc, HWC_DISPLAY_PRIMARY, timestamp); 199 200 } while (true); 201 } 202 203 for (int dpy = HWC_DISPLAY_PRIMARY; dpy <= HWC_DISPLAY_EXTERNAL; dpy++ ) { 204 for( size_t event = 0; event < num_events; event++) { 205 if(pfd[dpy][event].fd >= 0) 206 close (pfd[dpy][event].fd); 207 } 208 } 209 210 return NULL; 211 } 212 213 void init_vsync_thread(hwc_context_t* ctx) 214 { 215 int ret; 216 pthread_t vsync_thread; 217 ALOGI("Initializing VSYNC Thread"); 218 ret = pthread_create(&vsync_thread, NULL, vsync_loop, (void*) ctx); 219 if (ret) { 220 ALOGE("%s: failed to create %s: %s", __FUNCTION__, 221 HWC_VSYNC_THREAD_NAME, strerror(ret)); 222 } 223 } 224 225 }; //namespace 226
