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 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 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 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 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) 101 102 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 } 213 214 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
