5182a78d88
Change-Id: I3d24ff1757e79c4b41ff6c6db17d0274cd665671 (cherry picked from commit f8942672226a7af26218aa8d325c1677ae2b83dd)
111 lines
3.4 KiB
C++
111 lines
3.4 KiB
C++
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/*
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* Copyright (C) 2010 The Android Open Source Project
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* Copyright (C) 2012, The Linux Foundation. All rights reserved.
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*
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* Not a Contribution, Apache license notifications and license are
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* retained for attribution purposes only.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define UEVENT_DEBUG 0
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#include <hardware_legacy/uevent.h>
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#include <utils/Log.h>
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#include <sys/resource.h>
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#include <sys/prctl.h>
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#include <string.h>
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#include <stdlib.h>
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#include "hwc_utils.h"
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#include "external.h"
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namespace qhwc {
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#define HWC_UEVENT_THREAD_NAME "hwcUeventThread"
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static void handle_uevent(hwc_context_t* ctx, const char* udata, int len)
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{
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int vsync = 0;
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int64_t timestamp = 0;
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const char *str = udata;
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if(!strcasestr(str, "change@/devices/virtual/switch/hdmi") &&
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!strcasestr(str, "change@/devices/virtual/switch/wfd")) {
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ALOGD_IF(UEVENT_DEBUG, "%s: Not Ext Disp Event ", __FUNCTION__);
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return;
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}
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int connected = -1; // initial value - will be set to 1/0 based on hotplug
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// parse HDMI/WFD switch state for connect/disconnect
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// for HDMI:
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// The event will be of the form:
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// change@/devices/virtual/switch/hdmi ACTION=change
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// SWITCH_STATE=1 or SWITCH_STATE=0
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while(*str) {
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if (!strncmp(str, "SWITCH_STATE=", strlen("SWITCH_STATE="))) {
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connected = atoi(str + strlen("SWITCH_STATE="));
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//Disabled until SF calls unblank
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ctx->dpyAttr[HWC_DISPLAY_EXTERNAL].isActive = false;
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break;
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}
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str += strlen(str) + 1;
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if (str - udata >= len)
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break;
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}
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if(connected != -1) { //either we got switch_state connected or disconnect
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ctx->dpyAttr[HWC_DISPLAY_EXTERNAL].connected = connected;
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if(connected) {
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ctx->mExtDisplay->processUEventOnline(udata);
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}else {
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ctx->mExtDisplay->processUEventOffline(udata);
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}
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ALOGD("%s sending hotplug: connected = %d", __FUNCTION__, connected);
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Locker::Autolock _l(ctx->mExtSetLock); //hwc comp could be on
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ctx->proc->hotplug(ctx->proc, HWC_DISPLAY_EXTERNAL, connected);
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}
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}
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static void *uevent_loop(void *param)
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{
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int len = 0;
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static char udata[PAGE_SIZE];
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hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param);
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char thread_name[64] = HWC_UEVENT_THREAD_NAME;
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prctl(PR_SET_NAME, (unsigned long) &thread_name, 0, 0, 0);
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setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY);
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uevent_init();
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while(1) {
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len = uevent_next_event(udata, sizeof(udata) - 2);
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handle_uevent(ctx, udata, len);
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}
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return NULL;
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}
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void init_uevent_thread(hwc_context_t* ctx)
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{
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pthread_t uevent_thread;
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int ret;
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ALOGI("Initializing UEVENT Thread");
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ret = pthread_create(&uevent_thread, NULL, uevent_loop, (void*) ctx);
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if (ret) {
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ALOGE("%s: failed to create %s: %s", __FUNCTION__,
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HWC_UEVENT_THREAD_NAME, strerror(ret));
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}
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}
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}; //namespace
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