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 "hdmi.h" 31 #include "qd_utils.h" 32 #include "string.h" 33 #include "overlay.h" 34 #define __STDC_FORMAT_MACROS 1 35 #include <inttypes.h> 36 37 using namespace qdutils; 38 namespace qhwc { 39 40 #define HWC_VSYNC_THREAD_NAME "hwcVsyncThread" 41 #define PANEL_ON_STR "panel_power_on =" 42 #define ARRAY_LENGTH(array) (sizeof((array))/sizeof((array)[0])) 43 #define MAX_THERMAL_LEVEL 3 44 const int MAX_DATA = 64; 45 46 int hwc_vsync_control(hwc_context_t* ctx, int dpy, int enable) 47 { 48 int ret = 0; 49 if(!ctx->vstate.fakevsync && 50 ioctl(ctx->dpyAttr[dpy].fd, MSMFB_OVERLAY_VSYNC_CTRL, 51 &enable) < 0) { 52 ALOGE("%s: vsync control failed. Dpy=%d, enable=%d : %s", 53 __FUNCTION__, dpy, enable, strerror(errno)); 54 ret = -errno; 55 } 56 return ret; 57 } 58 59 static void handle_vsync_event(hwc_context_t* ctx, int dpy, char *data) 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 (ctx->vstate.debug, "%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 { 74 if (!strncmp(data, PANEL_ON_STR, strlen(PANEL_ON_STR))) { 75 unsigned long int poweron = strtoul(data + strlen(PANEL_ON_STR), NULL, 0); 76 ALOGI("%s: dpy:%d panel power state: %ld", __FUNCTION__, dpy, poweron); 77 if (!ctx->mHDMIDisplay->isHDMIPrimaryDisplay()) { 78 ctx->dpyAttr[dpy].isActive = poweron ? true: false; 79 } 80 } 81 } 82 83 static void handle_thermal_event(hwc_context_t* ctx, int dpy, char *data) 84 { 85 // extract thermal level 86 uint64_t thermalLevel = 0; 87 if (!strncmp(data, "thermal_level=", strlen("thermal_level="))) { 88 thermalLevel = strtoull(data + strlen("thermal_level="), NULL, 0); 89 } 90 91 if (thermalLevel >= MAX_THERMAL_LEVEL) { 92 ALOGD("%s: dpy:%d thermal_level=%" PRIu64"",__FUNCTION__,dpy,thermalLevel); 93 ctx->mThermalBurstMode = true; 94 } else 95 ctx->mThermalBurstMode = false; 96 } 97 98 struct event { 99 const char* name; 100 void (*callback)(hwc_context_t* ctx, int dpy, char *data); 101 }; 102 103 struct event event_list[] = { 104 { "vsync_event", handle_vsync_event }, 105 { "show_blank_event", handle_blank_event }, 106 { "msm_fb_thermal_level", handle_thermal_event }, 107 }; 108 109 #define num_events ARRAY_LENGTH(event_list) 110 111 static void *vsync_loop(void *param) 112 { 113 hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param); 114 115 char thread_name[64] = HWC_VSYNC_THREAD_NAME; 116 prctl(PR_SET_NAME, (unsigned long) &thread_name, 0, 0, 0); 117 setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY + 118 android::PRIORITY_MORE_FAVORABLE); 119 120 char vdata[MAX_DATA]; 121 //Number of physical displays 122 //We poll on all the nodes. 123 int num_displays = HWC_NUM_DISPLAY_TYPES - 1; 124 struct pollfd pfd[num_displays][num_events]; 125 126 char property[PROPERTY_VALUE_MAX]; 127 if(property_get("debug.hwc.fakevsync", property, NULL) > 0) { 128 if(atoi(property) == 1) 129 ctx->vstate.fakevsync = true; 130 } 131 132 char node_path[MAX_SYSFS_FILE_PATH]; 133 134 for (int dpy = HWC_DISPLAY_PRIMARY; dpy < num_displays; dpy++) { 135 for(size_t ev = 0; ev < num_events; ev++) { 136 snprintf(node_path, sizeof(node_path), 137 "/sys/class/graphics/fb%d/%s", 138 dpy == HWC_DISPLAY_PRIMARY ? 0 : 139 overlay::Overlay::getInstance()-> 140 getFbForDpy(HWC_DISPLAY_EXTERNAL), 141 event_list[ev].name); 142 143 ALOGI("%s: Reading event %zu for dpy %d from %s", __FUNCTION__, 144 ev, dpy, node_path); 145 pfd[dpy][ev].fd = open(node_path, O_RDONLY); 146 147 if (dpy == HWC_DISPLAY_PRIMARY && pfd[dpy][ev].fd < 0) { 148 // Make sure fb device is opened before starting 149 // this thread so this never happens. 150 ALOGE ("%s:unable to open event node for dpy=%d event=%zu, %s", 151 __FUNCTION__, dpy, ev, strerror(errno)); 152 if (ev == 0) { 153 ctx->vstate.fakevsync = true; 154 //XXX: Blank events don't work with fake vsync, 155 //but we shouldn't be running on fake vsync anyway. 156 break; 157 } 158 } 159 160 pread(pfd[dpy][ev].fd, vdata , MAX_DATA, 0); 161 if (pfd[dpy][ev].fd >= 0) 162 pfd[dpy][ev].events = POLLPRI | POLLERR; 163 } 164 } 165 166 if (LIKELY(!ctx->vstate.fakevsync)) { 167 do { 168 int err = poll(*pfd, (int)(num_displays * num_events), -1); 169 if(err > 0) { 170 for (int dpy = HWC_DISPLAY_PRIMARY; dpy < num_displays; dpy++) { 171 for(size_t ev = 0; ev < num_events; ev++) { 172 if (pfd[dpy][ev].revents & POLLPRI) { 173 ssize_t len = pread(pfd[dpy][ev].fd, vdata, MAX_DATA, 0); 174 if (UNLIKELY(len < 0)) { 175 // If the read was just interrupted - it is not 176 // a fatal error. Just continue in this case 177 ALOGE ("%s: Unable to read event:%zu for \ 178 dpy=%d : %s", 179 __FUNCTION__, ev, dpy, strerror(errno)); 180 continue; 181 } 182 event_list[ev].callback(ctx, dpy, vdata); 183 } 184 } 185 } 186 } else { 187 ALOGE("%s: poll failed errno: %s", __FUNCTION__, 188 strerror(errno)); 189 continue; 190 } 191 } while (true); 192 193 } else { 194 195 //Fake vsync is used only when set explicitly through a property or when 196 //the vsync timestamp node cannot be opened at bootup. There is no 197 //fallback to fake vsync from the true vsync loop, ever, as the 198 //condition can easily escape detection. 199 //Also, fake vsync is delivered only for the primary display. 200 do { 201 usleep(16666); 202 uint64_t timestamp = systemTime(); 203 ctx->proc->vsync(ctx->proc, HWC_DISPLAY_PRIMARY, timestamp); 204 205 } while (true); 206 } 207 208 for (int dpy = HWC_DISPLAY_PRIMARY; dpy <= HWC_DISPLAY_EXTERNAL; dpy++ ) { 209 for( size_t event = 0; event < num_events; event++) { 210 if(pfd[dpy][event].fd >= 0) 211 close (pfd[dpy][event].fd); 212 } 213 } 214 215 return NULL; 216 } 217 218 void init_vsync_thread(hwc_context_t* ctx) 219 { 220 int ret; 221 pthread_t vsync_thread; 222 ALOGI("Initializing VSYNC Thread"); 223 ret = pthread_create(&vsync_thread, NULL, vsync_loop, (void*) ctx); 224 if (ret) { 225 ALOGE("%s: failed to create %s: %s", __FUNCTION__, 226 HWC_VSYNC_THREAD_NAME, strerror(ret)); 227 } 228 } 229 230 }; //namespace 231
