1 2 /* 3 * Copyright (C) 2010 The Android Open Source Project 4 * Copyright (C) 2012, The Linux Foundation. All rights reserved. 5 * 6 * Not a Contribution, Apache license notifications and license are 7 * retained for attribution purposes only. 8 9 * Licensed under the Apache License, Version 2.0 (the "License"); 10 * you may not use this file except in compliance with the License. 11 * You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 */ 21 #define UEVENT_DEBUG 0 22 #include <hardware_legacy/uevent.h> 23 #include <utils/Log.h> 24 #include <sys/resource.h> 25 #include <sys/prctl.h> 26 #include <string.h> 27 #include <stdlib.h> 28 #include "hwc_utils.h" 29 #include "hwc_fbupdate.h" 30 #include "hwc_mdpcomp.h" 31 #include "hwc_copybit.h" 32 #include "comptype.h" 33 #include "external.h" 34 35 namespace qhwc { 36 37 #define HWC_UEVENT_THREAD_NAME "hwcUeventThread" 38 39 /* External Display states */ 40 enum { 41 EXTERNAL_OFFLINE = 0, 42 EXTERNAL_ONLINE, 43 EXTERNAL_PAUSE, 44 EXTERNAL_RESUME 45 }; 46 47 static bool isHDMI(const char* str) 48 { 49 if(strcasestr("change@/devices/virtual/switch/hdmi", str)) 50 return true; 51 return false; 52 } 53 54 static void handle_uevent(hwc_context_t* ctx, const char* udata, int len) 55 { 56 const char *str = udata; 57 bool usecopybit = false; 58 int compositionType = 59 qdutils::QCCompositionType::getInstance().getCompositionType(); 60 61 if (compositionType & (qdutils::COMPOSITION_TYPE_DYN | 62 qdutils::COMPOSITION_TYPE_MDP | 63 qdutils::COMPOSITION_TYPE_C2D)) { 64 usecopybit = true; 65 } 66 67 if(!strcasestr("change@/devices/virtual/switch/hdmi", str) && 68 !strcasestr("change@/devices/virtual/switch/wfd", str)) { 69 ALOGD_IF(UEVENT_DEBUG, "%s: Not Ext Disp Event ", __FUNCTION__); 70 return; 71 } 72 int connected = -1; // initial value - will be set to 1/0 based on hotplug 73 int extDpyNum = HWC_DISPLAY_EXTERNAL; 74 char property[PROPERTY_VALUE_MAX]; 75 if((property_get("persist.sys.wfd.virtual", property, NULL) > 0) && 76 (!strncmp(property, "1", PROPERTY_VALUE_MAX ) || 77 (!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) { 78 // This means we are using Google API to trigger WFD Display 79 extDpyNum = HWC_DISPLAY_VIRTUAL; 80 81 } 82 83 int dpy = isHDMI(str) ? HWC_DISPLAY_EXTERNAL : extDpyNum; 84 85 // update extDpyNum 86 ctx->mExtDisplay->setExtDpyNum(dpy); 87 88 // parse HDMI/WFD switch state for connect/disconnect 89 // for HDMI: 90 // The event will be of the form: 91 // change@/devices/virtual/switch/hdmi ACTION=change 92 // SWITCH_STATE=1 or SWITCH_STATE=0 93 while(*str) { 94 if (!strncmp(str, "SWITCH_STATE=", strlen("SWITCH_STATE="))) { 95 connected = atoi(str + strlen("SWITCH_STATE=")); 96 //Disabled until SF calls unblank 97 ctx->dpyAttr[HWC_DISPLAY_EXTERNAL].isActive = false; 98 //Ignored for Virtual Displays 99 //ToDo: we can do this in a much better way 100 ctx->dpyAttr[HWC_DISPLAY_VIRTUAL].isActive = true; 101 break; 102 } 103 str += strlen(str) + 1; 104 if (str - udata >= len) 105 break; 106 } 107 108 switch(connected) { 109 case EXTERNAL_OFFLINE: 110 { // disconnect event 111 ctx->mExtDisplay->processUEventOffline(udata); 112 if(ctx->mFBUpdate[dpy]) { 113 Locker::Autolock _l(ctx->mExtSetLock); 114 delete ctx->mFBUpdate[dpy]; 115 ctx->mFBUpdate[dpy] = NULL; 116 } 117 if(ctx->mCopyBit[dpy]){ 118 Locker::Autolock _l(ctx->mExtSetLock); 119 delete ctx->mCopyBit[dpy]; 120 ctx->mCopyBit[dpy] = NULL; 121 } 122 if(ctx->mMDPComp[dpy]) { 123 delete ctx->mMDPComp[dpy]; 124 ctx->mMDPComp[dpy] = NULL; 125 } 126 ALOGD("%s sending hotplug: connected = %d and dpy:%d", 127 __FUNCTION__, connected, dpy); 128 ctx->dpyAttr[dpy].connected = false; 129 Locker::Autolock _l(ctx->mExtSetLock); 130 //hwc comp could be on 131 ctx->proc->hotplug(ctx->proc, dpy, connected); 132 break; 133 } 134 case EXTERNAL_ONLINE: 135 { // connect case 136 ctx->mExtDispConfiguring = true; 137 ctx->mExtDisplay->processUEventOnline(udata); 138 ctx->mFBUpdate[dpy] = 139 IFBUpdate::getObject(ctx->dpyAttr[dpy].xres, dpy); 140 ctx->dpyAttr[dpy].isPause = false; 141 if(usecopybit) 142 ctx->mCopyBit[dpy] = new CopyBit(); 143 ctx->mMDPComp[dpy] = MDPComp::getObject( 144 ctx->dpyAttr[dpy].xres, dpy); 145 ALOGD("%s sending hotplug: connected = %d", __FUNCTION__, 146 connected); 147 ctx->dpyAttr[dpy].connected = true; 148 Locker::Autolock _l(ctx->mExtSetLock); //hwc comp could be on 149 ctx->proc->hotplug(ctx->proc, dpy, connected); 150 break; 151 } 152 case EXTERNAL_PAUSE: 153 { // pause case 154 ALOGD("%s Received Pause event",__FUNCTION__); 155 // This is required to ensure that composition 156 // fall back to FB, closing all MDP pipes. 157 ctx->mExtDispConfiguring = true; 158 ctx->dpyAttr[dpy].isActive = true; 159 ctx->dpyAttr[dpy].isPause = true; 160 break; 161 } 162 case EXTERNAL_RESUME: 163 { // resume case 164 ALOGD("%s Received resume event",__FUNCTION__); 165 ctx->dpyAttr[dpy].isActive = true; 166 ctx->dpyAttr[dpy].isPause = false; 167 break; 168 } 169 default: 170 { 171 ALOGE("ignore event and connected:%d",connected); 172 break; 173 } 174 } 175 } 176 177 static void *uevent_loop(void *param) 178 { 179 int len = 0; 180 static char udata[PAGE_SIZE]; 181 hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param); 182 char thread_name[64] = HWC_UEVENT_THREAD_NAME; 183 prctl(PR_SET_NAME, (unsigned long) &thread_name, 0, 0, 0); 184 setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY); 185 uevent_init(); 186 187 while(1) { 188 len = uevent_next_event(udata, sizeof(udata) - 2); 189 handle_uevent(ctx, udata, len); 190 } 191 192 return NULL; 193 } 194 195 void init_uevent_thread(hwc_context_t* ctx) 196 { 197 pthread_t uevent_thread; 198 int ret; 199 200 ALOGI("Initializing UEVENT Thread"); 201 ret = pthread_create(&uevent_thread, NULL, uevent_loop, (void*) ctx); 202 if (ret) { 203 ALOGE("%s: failed to create %s: %s", __FUNCTION__, 204 HWC_UEVENT_THREAD_NAME, strerror(ret)); 205 } 206 } 207 208 }; //namespace 209
